{"schema":"threatline.record/2","record":{"id":"CVE-2026-67234","aliases":["GHSA-q286-p3m9-j69f"],"summary":"RabbitMQ: Non-RFC-conformant cookie name when clearing the auth-mechanism preference","details":"RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.8 and 4.3.2, get_auth_mechanism/1 used term_to_binary/1 on the strict_auth_mechanism or preferred_auth_mechanism atom when clearing the corresponding cookie, producing a non-ASCII cookie name that violates RFC 6265 and can prevent the browser from deleting the preference. The issue is not directly exploitable for code execution or data exfiltration; its security relevance is limited to stale authentication-mechanism preferences persisting across logout and login cycles. This issue is fixed in versions 4.2.8 and 4.3.2.","categories":["Unclassified"],"product":"rabbitmq-server","vendor":"rabbitmq","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-67234","source_modified_at":"2026-09-25T19:53:58.560Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"rabbitmq-server","vendor":"rabbitmq","versions":[{"status":"affected","version":">= 4.2.0, < 4.2.8"},{"status":"affected","version":">= 4.3.0, < 4.3.2"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f","source_modified_at":"2026-07-29T15:05:41Z","fetched_at":"2026-10-23T18:55:00.935475Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.2.0, < 4.2.8"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f","source_modified_at":"2026-07-29T15:05:41Z","fetched_at":"2026-10-23T18:55:00.935475Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"range":">= 4.3.0, < 4.3.2"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f","source_modified_at":"2026-07-29T15:05:41Z","fetched_at":"2026-10-23T18:55:00.935475Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.2.8"},{"source":"GitHub Advisory Database","source_url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f","source_modified_at":"2026-07-29T15:05:41Z","fetched_at":"2026-10-23T18:55:00.935475Z","package":{"ecosystem":"other","name":"rabbitmq-server"},"version":"4.3.2"}],"cvss":2.3,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00425,"percentile":0.35718,"score_date":"2026-10-23"},"published_at":"2026-09-25T16:03:38.161Z","modified_at":"2026-09-25T19:53:58.560Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-67234","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-09-25T19:53:58.560Z"},{"source":"GitHub Advisory Database","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f","fetched_at":"2026-10-23T18:55:00.935475Z","source_modified_at":"2026-07-29T15:05:41Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-67234","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-q286-p3m9-j69f","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/149cb59d618cefa83c6deb02dbbb1e8a7a2bc968","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/commit/baac0aaf170efeb4f124ee36b8417274fa8dcc1a","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.8","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.2","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-09-25T19:53:50.305307Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-09-25T19:53:58.560Z","content_hash":"51d94a78e35df30da2d4f09e117af7309c880de052fc7d22bf9524d24b8b88ae"}}