{"items":[{"id":"NVI-00013274","kind":"vulnerability","title":"webpack-dev-middleware vulnerable to Path Traversal via non-slash-terminated publicPath","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g84c-rxfj-3j2c","CVE-2026-76844"],"plain_summary":"GitHub lists this reviewed advisory for webpack-dev-middleware, webpack-dev-middleware. 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-07dab13e7b76c593ca021275156ba33d"],"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":"2026-09-29T16:59:19.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-af27b179215af18ae7043c83fd516822"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.592%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.48299. Missing scores are unknown.","source_id":"sr-07dab13e7b76c593ca021275156ba33d"}],"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-af27b179215af18ae7043c83fd516822","url":"https://github.com/advisories/GHSA-g84c-rxfj-3j2c","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g84c-rxfj-3j2c","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:24:25.558Z"},{"id":"sr-07dab13e7b76c593ca021275156ba33d","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-2026-76844","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:15:58.862Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-af27b179215af18ae7043c83fd516822"],"technology":"webpack-dev-middleware","known_exclusions":[],"conditions_summary":"> [!IMPORTANT]\n> CVE-2026-76844 was assigned and published for this issue by VulnCheck on 2026-08-24 without prior coordination with the webpack maintainers or the OpenJS Foundation, which holds the CVE Numbering Authority scope for webpack projects. Neither the maintainers nor the OpenJS CNA were notified before publication, and no fix was available at that time. This advisory is the coordinated record produced by the webpack maintainers and the OpenJS Foundation CNA.\n\n### Impact\n\n`webpack-dev-middleware` resolves a request to a local file in `getFilenameFromUrl`. When the configured `publicPath` has no trailing slash (for example `/assets`), a request that shares that prefix without being under it (for example `/assets../secret`) still passes the containment check, and the `..` guard does not catch it because it runs on the path before the `publicPath` prefix is stripped. The stripped remainder then escapes the configured output directory once joined, so an unauthenticated request can read files outside the output root. Applications serving `webpack-dev-middleware` (directly or via `webpack-dev-server`) with a `publicPath` that does not end in a slash are affected. A development ","public_affected_ranges":[">= 8.0.0, < 8.3.0"]},{"certainty":"source_listed","source_ids":["sr-af27b179215af18ae7043c83fd516822"],"technology":"webpack-dev-middleware","known_exclusions":[],"conditions_summary":"> [!IMPORTANT]\n> CVE-2026-76844 was assigned and published for this issue by VulnCheck on 2026-08-24 without prior coordination with the webpack maintainers or the OpenJS Foundation, which holds the CVE Numbering Authority scope for webpack projects. Neither the maintainers nor the OpenJS CNA were notified before publication, and no fix was available at that time. This advisory is the coordinated record produced by the webpack maintainers and the OpenJS Foundation CNA.\n\n### Impact\n\n`webpack-dev-middleware` resolves a request to a local file in `getFilenameFromUrl`. When the configured `publicPath` has no trailing slash (for example `/assets`), a request that shares that prefix without being under it (for example `/assets../secret`) still passes the containment check, and the `..` guard does not catch it because it runs on the path before the `publicPath` prefix is stripped. The stripped remainder then escapes the configured output directory once joined, so an unauthenticated request can read files outside the output root. Applications serving `webpack-dev-middleware` (directly or via `webpack-dev-server`) with a `publicPath` that does not end in a slash are affected. A development ","public_affected_ranges":["< 7.4.5"]}],"null_published_at":"2026-11-03T17:49:15.020Z","source_updated_at":"2026-09-29T16:59:19.000Z","source_disclosed_at":"2026-09-29T16:59:18.000Z","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":"2026-11-01T07:24:25.558Z"},{"id":"NVI-00013274","kind":"vulnerability","title":"webpack-dev-middleware vulnerable to Path Traversal via non-slash-terminated publicPath","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g84c-rxfj-3j2c","CVE-2026-76844"],"plain_summary":"GitHub lists this reviewed advisory for webpack-dev-middleware, webpack-dev-middleware. 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-06f47bcbd8a9a829016e7a6f01d9c3f2"],"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":"2026-09-29T16:59:19.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-af27b179215af18ae7043c83fd516822"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.592%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.48311. Missing scores are unknown.","source_id":"sr-06f47bcbd8a9a829016e7a6f01d9c3f2"}],"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-af27b179215af18ae7043c83fd516822","url":"https://github.com/advisories/GHSA-g84c-rxfj-3j2c","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g84c-rxfj-3j2c","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:24:25.558Z"},{"id":"sr-06f47bcbd8a9a829016e7a6f01d9c3f2","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-2026-76844","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.286Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-af27b179215af18ae7043c83fd516822"],"technology":"webpack-dev-middleware","known_exclusions":[],"conditions_summary":"> [!IMPORTANT]\n> CVE-2026-76844 was assigned and published for this issue by VulnCheck on 2026-08-24 without prior coordination with the webpack maintainers or the OpenJS Foundation, which holds the CVE Numbering Authority scope for webpack projects. Neither the maintainers nor the OpenJS CNA were notified before publication, and no fix was available at that time. This advisory is the coordinated record produced by the webpack maintainers and the OpenJS Foundation CNA.\n\n### Impact\n\n`webpack-dev-middleware` resolves a request to a local file in `getFilenameFromUrl`. When the configured `publicPath` has no trailing slash (for example `/assets`), a request that shares that prefix without being under it (for example `/assets../secret`) still passes the containment check, and the `..` guard does not catch it because it runs on the path before the `publicPath` prefix is stripped. The stripped remainder then escapes the configured output directory once joined, so an unauthenticated request can read files outside the output root. Applications serving `webpack-dev-middleware` (directly or via `webpack-dev-server`) with a `publicPath` that does not end in a slash are affected. A development ","public_affected_ranges":[">= 8.0.0, < 8.3.0"]},{"certainty":"source_listed","source_ids":["sr-af27b179215af18ae7043c83fd516822"],"technology":"webpack-dev-middleware","known_exclusions":[],"conditions_summary":"> [!IMPORTANT]\n> CVE-2026-76844 was assigned and published for this issue by VulnCheck on 2026-08-24 without prior coordination with the webpack maintainers or the OpenJS Foundation, which holds the CVE Numbering Authority scope for webpack projects. Neither the maintainers nor the OpenJS CNA were notified before publication, and no fix was available at that time. This advisory is the coordinated record produced by the webpack maintainers and the OpenJS Foundation CNA.\n\n### Impact\n\n`webpack-dev-middleware` resolves a request to a local file in `getFilenameFromUrl`. When the configured `publicPath` has no trailing slash (for example `/assets`), a request that shares that prefix without being under it (for example `/assets../secret`) still passes the containment check, and the `..` guard does not catch it because it runs on the path before the `publicPath` prefix is stripped. The stripped remainder then escapes the configured output directory once joined, so an unauthenticated request can read files outside the output root. Applications serving `webpack-dev-middleware` (directly or via `webpack-dev-server`) with a `publicPath` that does not end in a slash are affected. A development ","public_affected_ranges":["< 7.4.5"]}],"null_published_at":"2026-11-02T20:21:07.826Z","source_updated_at":"2026-09-29T16:59:19.000Z","source_disclosed_at":"2026-09-29T16:59:18.000Z","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":"2026-11-01T07:24:25.558Z"},{"id":"NVI-00013274","kind":"vulnerability","title":"webpack-dev-middleware vulnerable to Path Traversal via non-slash-terminated publicPath","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-g84c-rxfj-3j2c","CVE-2026-76844"],"plain_summary":"GitHub lists this reviewed advisory for webpack-dev-middleware, webpack-dev-middleware. 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-af27b179215af18ae7043c83fd516822"],"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":"2026-09-29T16:59:19.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-af27b179215af18ae7043c83fd516822"}],"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-af27b179215af18ae7043c83fd516822","url":"https://github.com/advisories/GHSA-g84c-rxfj-3j2c","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-g84c-rxfj-3j2c","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:24:25.558Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-af27b179215af18ae7043c83fd516822"],"technology":"webpack-dev-middleware","known_exclusions":[],"conditions_summary":"> [!IMPORTANT]\n> CVE-2026-76844 was assigned and published for this issue by VulnCheck on 2026-08-24 without prior coordination with the webpack maintainers or the OpenJS Foundation, which holds the CVE Numbering Authority scope for webpack projects. Neither the maintainers nor the OpenJS CNA were notified before publication, and no fix was available at that time. This advisory is the coordinated record produced by the webpack maintainers and the OpenJS Foundation CNA.\n\n### Impact\n\n`webpack-dev-middleware` resolves a request to a local file in `getFilenameFromUrl`. When the configured `publicPath` has no trailing slash (for example `/assets`), a request that shares that prefix without being under it (for example `/assets../secret`) still passes the containment check, and the `..` guard does not catch it because it runs on the path before the `publicPath` prefix is stripped. The stripped remainder then escapes the configured output directory once joined, so an unauthenticated request can read files outside the output root. Applications serving `webpack-dev-middleware` (directly or via `webpack-dev-server`) with a `publicPath` that does not end in a slash are affected. A development ","public_affected_ranges":[">= 8.0.0, < 8.3.0"]},{"certainty":"source_listed","source_ids":["sr-af27b179215af18ae7043c83fd516822"],"technology":"webpack-dev-middleware","known_exclusions":[],"conditions_summary":"> [!IMPORTANT]\n> CVE-2026-76844 was assigned and published for this issue by VulnCheck on 2026-08-24 without prior coordination with the webpack maintainers or the OpenJS Foundation, which holds the CVE Numbering Authority scope for webpack projects. Neither the maintainers nor the OpenJS CNA were notified before publication, and no fix was available at that time. This advisory is the coordinated record produced by the webpack maintainers and the OpenJS Foundation CNA.\n\n### Impact\n\n`webpack-dev-middleware` resolves a request to a local file in `getFilenameFromUrl`. When the configured `publicPath` has no trailing slash (for example `/assets`), a request that shares that prefix without being under it (for example `/assets../secret`) still passes the containment check, and the `..` guard does not catch it because it runs on the path before the `publicPath` prefix is stripped. The stripped remainder then escapes the configured output directory once joined, so an unauthenticated request can read files outside the output root. Applications serving `webpack-dev-middleware` (directly or via `webpack-dev-server`) with a `publicPath` that does not end in a slash are affected. A development ","public_affected_ranges":["< 7.4.5"]}],"null_published_at":"2026-11-01T07:29:12.933Z","source_updated_at":"2026-09-29T16:59:19.000Z","source_disclosed_at":"2026-09-29T16:59:18.000Z","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":"2026-11-01T07:24:25.558Z"}],"next_cursor":null,"snapshot_revision":"42594"}