{"items":[{"id":"NVI-00004309","kind":"vulnerability","title":"Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-gjfg-22fp-rrxx","CVE-2026-59946"],"plain_summary":"GitHub lists this reviewed advisory for composer/composer, composer/composer. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-425a9cc5ecc187af0b862ae55585f207"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.10.2 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.2.29 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-20T21:57:41.000Z","value":"6.1 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6e9a303f6e20217d0c5fd16676988726"},{"kind":"CVSS","as_of":"2026-07-10T19:14:18.563Z","value":"6.1 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1e9390661a836ca683e37f0f225af36a"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.141%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.03396. Missing scores are unknown.","source_id":"sr-425a9cc5ecc187af0b862ae55585f207"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-6e9a303f6e20217d0c5fd16676988726","url":"https://github.com/advisories/GHSA-gjfg-22fp-rrxx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-gjfg-22fp-rrxx","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:35:18.117Z"},{"id":"sr-610864d4050fff9da2dbb2ca2614f398","url":"https://github.com/advisories/GHSA-gjfg-22fp-rrxx","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-gjfg-22fp-rrxx","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.418Z"},{"id":"sr-1e9390661a836ca683e37f0f225af36a","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59946","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-59946","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:39.943Z"},{"id":"sr-425a9cc5ecc187af0b862ae55585f207","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-59946","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.383Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6e9a303f6e20217d0c5fd16676988726"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":[">= 2.3.0, < 2.10.2"]},{"certainty":"source_listed","source_ids":["sr-6e9a303f6e20217d0c5fd16676988726"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":[">= 1.0.0, < 2.2.29"]},{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 2.3.0; fixed 2.10.2"]},{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 1.0.0; fixed 2.2.29"]}],"null_published_at":"2026-11-04T10:04:27.941Z","source_updated_at":"2026-07-20T21:57:41.000Z","source_disclosed_at":"2026-07-20T21:57:40.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:20.418Z"},{"id":"NVI-00004309","kind":"vulnerability","title":"Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-gjfg-22fp-rrxx","CVE-2026-59946"],"plain_summary":"OSV carries this publisher advisory for composer/composer, composer/composer. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.10.2 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.2.29 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-425a9cc5ecc187af0b862ae55585f207"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-10T19:14:18.563Z","value":"6.1 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-1e9390661a836ca683e37f0f225af36a"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.141%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.03396. Missing scores are unknown.","source_id":"sr-425a9cc5ecc187af0b862ae55585f207"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-610864d4050fff9da2dbb2ca2614f398","url":"https://github.com/advisories/GHSA-gjfg-22fp-rrxx","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-gjfg-22fp-rrxx","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.418Z"},{"id":"sr-1e9390661a836ca683e37f0f225af36a","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59946","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-59946","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:39.943Z"},{"id":"sr-425a9cc5ecc187af0b862ae55585f207","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-59946","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.383Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 2.3.0; fixed 2.10.2"]},{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 1.0.0; fixed 2.2.29"]}],"null_published_at":"2026-11-01T14:34:07.538Z","source_updated_at":"2026-07-20T22:00:25.381Z","source_disclosed_at":"2026-07-20T21:57:40.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:20.418Z"},{"id":"NVI-00004309","kind":"vulnerability","title":"Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gjfg-22fp-rrxx","CVE-2026-59946"],"plain_summary":"OSV carries this publisher advisory for composer/composer, composer/composer. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.10.2 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.2.29 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-425a9cc5ecc187af0b862ae55585f207"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.141%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.03396. Missing scores are unknown.","source_id":"sr-425a9cc5ecc187af0b862ae55585f207"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-610864d4050fff9da2dbb2ca2614f398","url":"https://github.com/advisories/GHSA-gjfg-22fp-rrxx","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-gjfg-22fp-rrxx","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.418Z"},{"id":"sr-425a9cc5ecc187af0b862ae55585f207","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-59946","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.383Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 2.3.0; fixed 2.10.2"]},{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 1.0.0; fixed 2.2.29"]}],"null_published_at":"2026-10-31T23:18:17.217Z","source_updated_at":"2026-07-20T22:00:25.381Z","source_disclosed_at":"2026-07-20T21:57:40.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:20.418Z"},{"id":"NVI-00004309","kind":"vulnerability","title":"Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-gjfg-22fp-rrxx","CVE-2026-59946"],"plain_summary":"OSV carries this publisher advisory for composer/composer, composer/composer. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.10.2 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 2.2.29 for composer/composer. Confirm the publisher’s latest guidance.","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-610864d4050fff9da2dbb2ca2614f398","url":"https://github.com/advisories/GHSA-gjfg-22fp-rrxx","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-gjfg-22fp-rrxx","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.418Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 2.3.0; fixed 2.10.2"]},{"certainty":"source_listed","source_ids":["sr-610864d4050fff9da2dbb2ca2614f398"],"technology":"composer/composer","known_exclusions":[],"conditions_summary":"## Summary\n\nA Composer package declares its executables in the `bin` field of its `composer.json`. When Composer installs a package, it processes each `bin` entry and changes the file mode of the corresponding file so it is executable.\n\nIf a `bin` entry contains `..` path segments, it can resolve to a path outside the package's own install directory. A malicious package can use this to make Composer run `chmod` against a file that already exists elsewhere on the machine. The resulting mode is world-readable and world-executable (0755 under the common umask of 022). This happens when the package is installed, e.g. during `composer install`, `composer update`, and `composer require`. Any dependency can trigger it, including a transitive dependency several levels deep.\n\nThe vulnerability *changes file permissions only, and does not read, modify, or execute the contents of the target file, and it is not remote code execution*. The impact is to confidentiality: a file with deliberately restrictive permissions, such as a private key at mode 0600, can be made readable by other users on the same host.\n\n## Am I affected?\n\nWe reviewed packagist.org data and found no evidence that any publish","public_affected_ranges":["ECOSYSTEM: introduced 1.0.0; fixed 2.2.29"]}],"null_published_at":"2026-10-31T22:12:52.641Z","source_updated_at":"2026-07-20T22:00:25.381Z","source_disclosed_at":"2026-07-20T21:57:40.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:20.418Z"}],"next_cursor":null,"snapshot_revision":"42594"}