{"id":"CVE-2026-117499","revision":null,"records":[{"revision":"2f6d6038032d4af99afd3ef081a423dd","observedAt":"2026-10-27T13:09:22.002+00:00","statement":{"source":"cve-program","id":"CVE-2026-117499","aliases":[],"title":"@fastify/session vulnerable to session revocation bypass via a logout race condition","description":"@fastify/session is a session plugin for Fastify. In all releases before 11.1.6, with the default rolling session behavior, a request that restored a session before a logout could save its own copy after another request had completed the session destroy call, recreating the destroyed session identifier with its authenticated data. An attacker who already holds a victim's valid signed session cookie and keeps a request in flight across the logout can replay that cookie to restore the session after it was meant to be revoked, without any cookie theft or signature forgery. The issue is fixed in @fastify/session 11.1.6, which adds a per session generation marker and a conditional store write so a session restored before a logout or regeneration cannot recreate or overwrite the current entry, and users should upgrade to 11.1.6 or later. There is no workaround, and custom session stores must implement the new conditional write.","state":0,"publishedAt":"2026-10-27T11:19:22.09+00:00","modifiedAt":"2026-10-27T11:19:22.09+00:00","affected":[{"ecosystem":"Vendor product","name":"@fastify/session","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@fastify/session\",\n                    \"product\": \"@fastify/session\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"11.1.6\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"11.1.6\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/@fastify/session\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","score":3.7,"severity":"LOW"}],"references":["https://github.com/fastify/session/security/advisories/GHSA-2hw7-jxfh-4rm3","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-117499","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-117499","identifiers":["CVE-2026-117499"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c6fb1f32c6754b21a98f51facdb3651d","complete":false,"records":13567,"lastAttemptAt":"2026-11-01T07:17:06.2762505+00:00","lastSuccessAt":"2026-11-01T07:17:06.272+00:00","error":"84 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-01T07:17:06.272+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13553,"expectedIdentifiers":13637,"failedIdentifiers":84},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-01T07:04:54.9851191+00:00","complete":true,"records":1095,"lastAttemptAt":"2026-11-01T07:04:54.9851191+00:00","lastSuccessAt":"2026-11-01T07:04:55.1534437+00:00","error":null,"lastVerifiedAt":"2026-11-01T07:04:55.1534441+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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