{"items":[{"id":"NVI-00009025","kind":"vulnerability","title":"follow-redirects: Cross-realm sensitiveHeaders arrays are discarded and custom credentials can follow redirects","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-mrwp-f3q8-3g9p","CVE-2026-116689"],"plain_summary":"GitHub lists this reviewed advisory for follow-redirects. 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-06e0dd491dd4fb3e861b1b0375615ef4"],"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 1.16.2 for follow-redirects. Confirm the publisher’s latest guidance.","source_ids":["sr-563230262859d38a6e4a04b28118d40e"],"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":"2026-10-30T22:59:34.000Z","value":"5.9 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7d1c3e2b7ca4794e8b1a8bff8263c203"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.266%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18802. Missing scores are unknown.","source_id":"sr-06e0dd491dd4fb3e861b1b0375615ef4"}],"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-7d1c3e2b7ca4794e8b1a8bff8263c203","url":"https://github.com/advisories/GHSA-mrwp-f3q8-3g9p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mrwp-f3q8-3g9p","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-563230262859d38a6e4a04b28118d40e","url":"https://github.com/advisories/GHSA-mrwp-f3q8-3g9p","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-mrwp-f3q8-3g9p","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T23:13:40.598Z"},{"id":"sr-06e0dd491dd4fb3e861b1b0375615ef4","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-2026-116689","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.267Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7d1c3e2b7ca4794e8b1a8bff8263c203"],"technology":"follow-redirects","known_exclusions":[],"conditions_summary":"### Summary\n\nfollow-redirects 1.16.0 and 1.16.1 validate the documented sensitiveHeaders option with instanceof Array. An array created in another JavaScript realm is silently replaced with an empty list, so a caller-declared custom credential header can be forwarded to an attacker-controlled cross-origin redirect destination.\n\n### Details\n\nAffected versions\n\nThe sensitiveHeaders option was introduced in 1.16.0. Published 1.16.0 and 1.16.1 both reproduced, giving a tested affected range of 1.16.0 through 1.16.1. The source checkout was pinned at revision 46301256333c90b7faac7aa126effe72ec16d16e; the exact npm 1.16.1 artifact reproduced independently.\n\nRoot cause\n\nindex.js resets options.sensitiveHeaders when its local isArray() helper returns false. That helper uses value instanceof Array, which depends on realm identity. The same file already uses Array.isArray(options.headers), which correctly recognizes arrays across realms.\n\nSuggested remediation\n\nUse Array.isArray(value) for sensitiveHeaders, then validate and normalize each member as a header-name string. Add same-realm and node:vm cross-realm tests for cross-origin redirects, including the array-form headers representation. ","public_affected_ranges":[">= 1.16.0, <= 1.16.1"]},{"certainty":"source_listed","source_ids":["sr-563230262859d38a6e4a04b28118d40e"],"technology":"follow-redirects","known_exclusions":[],"conditions_summary":"### Summary\n\nfollow-redirects 1.16.0 and 1.16.1 validate the documented sensitiveHeaders option with instanceof Array. An array created in another JavaScript realm is silently replaced with an empty list, so a caller-declared custom credential header can be forwarded to an attacker-controlled cross-origin redirect destination.\n\n### Details\n\nAffected versions\n\nThe sensitiveHeaders option was introduced in 1.16.0. Published 1.16.0 and 1.16.1 both reproduced, giving a tested affected range of 1.16.0 through 1.16.1. The source checkout was pinned at revision 46301256333c90b7faac7aa126effe72ec16d16e; the exact npm 1.16.1 artifact reproduced independently.\n\nRoot cause\n\nindex.js resets options.sensitiveHeaders when its local isArray() helper returns false. That helper uses value instanceof Array, which depends on realm identity. The same file already uses Array.isArray(options.headers), which correctly recognizes arrays across realms.\n\nSuggested remediation\n\nUse Array.isArray(value) for sensitiveHeaders, then validate and normalize each member as a header-name string. Add same-realm and node:vm cross-realm tests for cross-origin redirects, including the array-form headers representation. ","public_affected_ranges":["SEMVER: introduced 1.16.0; fixed 1.16.2"]}],"null_published_at":"2026-11-02T20:21:07.826Z","source_updated_at":"2026-10-30T22:59:34.000Z","source_disclosed_at":"2026-10-30T22:59:33.000Z","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":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00009025","kind":"vulnerability","title":"follow-redirects: Cross-realm sensitiveHeaders arrays are discarded and custom credentials can follow redirects","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-mrwp-f3q8-3g9p","CVE-2026-116689"],"plain_summary":"GitHub lists this reviewed advisory for follow-redirects. 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-0f7261fcab3200b78855577481805edf"],"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 1.16.2 for follow-redirects. Confirm the publisher’s latest guidance.","source_ids":["sr-563230262859d38a6e4a04b28118d40e"],"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":"2026-10-30T22:59:34.000Z","value":"5.9 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7d1c3e2b7ca4794e8b1a8bff8263c203"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.266%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18805. Missing scores are unknown.","source_id":"sr-0f7261fcab3200b78855577481805edf"}],"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-7d1c3e2b7ca4794e8b1a8bff8263c203","url":"https://github.com/advisories/GHSA-mrwp-f3q8-3g9p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mrwp-f3q8-3g9p","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-563230262859d38a6e4a04b28118d40e","url":"https://github.com/advisories/GHSA-mrwp-f3q8-3g9p","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-mrwp-f3q8-3g9p","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T23:13:40.598Z"},{"id":"sr-0f7261fcab3200b78855577481805edf","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-2026-116689","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7d1c3e2b7ca4794e8b1a8bff8263c203"],"technology":"follow-redirects","known_exclusions":[],"conditions_summary":"### Summary\n\nfollow-redirects 1.16.0 and 1.16.1 validate the documented sensitiveHeaders option with instanceof Array. An array created in another JavaScript realm is silently replaced with an empty list, so a caller-declared custom credential header can be forwarded to an attacker-controlled cross-origin redirect destination.\n\n### Details\n\nAffected versions\n\nThe sensitiveHeaders option was introduced in 1.16.0. Published 1.16.0 and 1.16.1 both reproduced, giving a tested affected range of 1.16.0 through 1.16.1. The source checkout was pinned at revision 46301256333c90b7faac7aa126effe72ec16d16e; the exact npm 1.16.1 artifact reproduced independently.\n\nRoot cause\n\nindex.js resets options.sensitiveHeaders when its local isArray() helper returns false. That helper uses value instanceof Array, which depends on realm identity. The same file already uses Array.isArray(options.headers), which correctly recognizes arrays across realms.\n\nSuggested remediation\n\nUse Array.isArray(value) for sensitiveHeaders, then validate and normalize each member as a header-name string. Add same-realm and node:vm cross-realm tests for cross-origin redirects, including the array-form headers representation. ","public_affected_ranges":[">= 1.16.0, <= 1.16.1"]},{"certainty":"source_listed","source_ids":["sr-563230262859d38a6e4a04b28118d40e"],"technology":"follow-redirects","known_exclusions":[],"conditions_summary":"### Summary\n\nfollow-redirects 1.16.0 and 1.16.1 validate the documented sensitiveHeaders option with instanceof Array. An array created in another JavaScript realm is silently replaced with an empty list, so a caller-declared custom credential header can be forwarded to an attacker-controlled cross-origin redirect destination.\n\n### Details\n\nAffected versions\n\nThe sensitiveHeaders option was introduced in 1.16.0. Published 1.16.0 and 1.16.1 both reproduced, giving a tested affected range of 1.16.0 through 1.16.1. The source checkout was pinned at revision 46301256333c90b7faac7aa126effe72ec16d16e; the exact npm 1.16.1 artifact reproduced independently.\n\nRoot cause\n\nindex.js resets options.sensitiveHeaders when its local isArray() helper returns false. That helper uses value instanceof Array, which depends on realm identity. The same file already uses Array.isArray(options.headers), which correctly recognizes arrays across realms.\n\nSuggested remediation\n\nUse Array.isArray(value) for sensitiveHeaders, then validate and normalize each member as a header-name string. Add same-realm and node:vm cross-realm tests for cross-origin redirects, including the array-form headers representation. ","public_affected_ranges":["SEMVER: introduced 1.16.0; fixed 1.16.2"]}],"null_published_at":"2026-11-01T01:03:56.578Z","source_updated_at":"2026-10-30T22:59:34.000Z","source_disclosed_at":"2026-10-30T22:59:33.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:55:49.621Z"},{"id":"NVI-00009025","kind":"vulnerability","title":"follow-redirects: Cross-realm sensitiveHeaders arrays are discarded and custom credentials can follow redirects","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-mrwp-f3q8-3g9p","CVE-2026-116689"],"plain_summary":"GitHub lists this reviewed advisory for follow-redirects. 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-0f7261fcab3200b78855577481805edf"],"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":"2026-10-30T22:59:34.000Z","value":"5.9 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-7d1c3e2b7ca4794e8b1a8bff8263c203"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.266%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.18805. Missing scores are unknown.","source_id":"sr-0f7261fcab3200b78855577481805edf"}],"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-7d1c3e2b7ca4794e8b1a8bff8263c203","url":"https://github.com/advisories/GHSA-mrwp-f3q8-3g9p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-mrwp-f3q8-3g9p","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:55:49.621Z"},{"id":"sr-0f7261fcab3200b78855577481805edf","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-2026-116689","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7d1c3e2b7ca4794e8b1a8bff8263c203"],"technology":"follow-redirects","known_exclusions":[],"conditions_summary":"### Summary\n\nfollow-redirects 1.16.0 and 1.16.1 validate the documented sensitiveHeaders option with instanceof Array. An array created in another JavaScript realm is silently replaced with an empty list, so a caller-declared custom credential header can be forwarded to an attacker-controlled cross-origin redirect destination.\n\n### Details\n\nAffected versions\n\nThe sensitiveHeaders option was introduced in 1.16.0. Published 1.16.0 and 1.16.1 both reproduced, giving a tested affected range of 1.16.0 through 1.16.1. The source checkout was pinned at revision 46301256333c90b7faac7aa126effe72ec16d16e; the exact npm 1.16.1 artifact reproduced independently.\n\nRoot cause\n\nindex.js resets options.sensitiveHeaders when its local isArray() helper returns false. That helper uses value instanceof Array, which depends on realm identity. The same file already uses Array.isArray(options.headers), which correctly recognizes arrays across realms.\n\nSuggested remediation\n\nUse Array.isArray(value) for sensitiveHeaders, then validate and normalize each member as a header-name string. Add same-realm and node:vm cross-realm tests for cross-origin redirects, including the array-form headers representation. ","public_affected_ranges":[">= 1.16.0, <= 1.16.1"]}],"null_published_at":"2026-10-31T22:13:44.239Z","source_updated_at":"2026-10-30T22:59:34.000Z","source_disclosed_at":"2026-10-30T22:59:33.000Z","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":"2026-10-31T21:55:49.621Z"}],"next_cursor":null,"snapshot_revision":"42594"}