{"schema":"threatline.record/2","record":{"id":"CVE-2026-67242","aliases":["GHSA-rrj4-g94f-rqj9"],"summary":"RabbitMQ: OAuth2 is_integer(Exp) guard skips token-expiry checks for float exp","details":"RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, OAuth2 isinteger(Exp) guard skips token-expiry checks for float exp. validatetokenexpiry/1 (lines 208-214) and expirytimestamp/1 (138-144) both guard with 'when isinteger(Exp)' and fall through to ok/never for float values. josejwt:verify validates only the signature, not exp. With float exp, no expiry validation occurs anywhere in the If the IdP emits exp as a JSON float (RFC 7519 permits fractional NumericDate), both the login-time expiry check and the mid-connection disconnect timer are silently skipped , an already-expired token is accepted, and connections never time OAuth2 backend enabled IdP emits float exp (uncommon; mainstream IdPs emit integers) Attacker possesses a previously-valid signed. This issue is fixed in versions 4.2.9 and 4.3.3.","categories":["Unclassified"],"product":"rabbitmq-server","vendor":"rabbitmq","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-67242","source_modified_at":"2026-09-25T20:01:12.537Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"rabbitmq-server","vendor":"rabbitmq","versions":[{"status":"affected","version":">= 4.2.0, < 4.2.9"},{"status":"affected","version":">= 4.3.0, < 4.3.3"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9","source_modified_at":"2026-07-29T15:07:25Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.2.0, < 4.2.9"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9","source_modified_at":"2026-07-29T15:07:25Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.3.0, < 4.3.3"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9","source_modified_at":"2026-07-29T15:07:25Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.2.9"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9","source_modified_at":"2026-07-29T15:07:25Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.3.3"}],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00345,"percentile":0.26768,"score_date":"2026-10-23"},"published_at":"2026-09-25T16:16:14.558Z","modified_at":"2026-09-25T20:01:12.537Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67242","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T20:01:12.537Z"},{"source":"GitHub Advisory Database","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9","fetched_at":"2026-10-24T05:41:33.294140Z","source_modified_at":"2026-07-29T15:07:25Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-67242","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-rrj4-g94f-rqj9","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/d10a369a96658d0fba1050bd43c732e58fcf28fd","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/f189a8824c9efbce46bd9438fcdbda4521cfc923","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-09-25T20:01:04.290645Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-25T20:01:12.537Z","content_hash":"985386e53f5dbff565cd7a8930e94019f95bf1e2d112548fb3a4ff9184e5d363"}}