{"success":true,"data":{"threats":[{"id":"c8e3c532-8996-4e6c-a7b8-9827c2ba6a4d","slug":"cve-2026-67409","externalId":"CVE-2026-67409","source":"NVD","sourceType":"cve-db","type":"vulnerability","title":"CVE-2026-67409 — RabbitMQ is a messaging and streaming broker.","description":"RabbitMQ is a messaging and streaming broker. From 3.13.0 until 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18, JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS (CWE-252). the JWKS key fetching mechanism in uaajwt.erl does not validate the HTTP response status code when downloading signing keys from the OAuth2 provider's JWKS endpoint. Non-200 responses (including 4xx and 5xx errors) are processed identically to successful responses. When the JWKS endpoint returns an error response with a valid-JSON body that lacks a keys field, all previously cached signing keys are destroyed, causing a persistent authentication denial of Files: deps/rabbitmqauthbackendoauth2/src/uaajwt.erl, lines 50-63 deps/rabbitmqauthbackendoauth2/src/uaajwks.erl, lines 5-7 deps/rabbitmqauthbackendoauth2/src/rabbitoauth2provider.erl, lines 98-107 Bug 1: HTTP status code ignored (uaajwt.erl:50-63): The Erlang httpc module returns {ok, {{HttpVersion, StatusCode, ReasonPhrase}, Headers, Body}}. The pattern {ok, {, , JwksBody}} matches ANY successful HTTP transaction Persistent authentication DoS: Once keys are destroyed, ALL OAuth2/JWT authentication fails for all users until a new successful JWKS refresh occurs Amplification: A single attacker can deny access to all legitimate OAuth2 users across the entire RabbitMQ. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18.","cveId":"CVE-2026-67409","cvssScore":8.2,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","severity":"high","vendor":"broadcom","product":"rabbitmq server","affectedVersions":[">= 3.13.0, < 3.13.18",">= 4.0.0, < 4.0.23",">= 4.1.0, < 4.1.14",">= 4.2.0, < 4.2.9",">= 4.3.0, < 4.3.3"],"cwes":["CWE-252"],"tags":["nvd","status:received","status:undergoing-analysis","status:analyzed"],"relatedCves":[],"titleFingerprint":null,"countryCodes":[],"knownExploited":false,"patchAvailable":false,"patchLinks":[],"references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9","type":"advisory","title":"Release Notes"},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3","type":"advisory","title":"Release Notes"},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-qw3h-qqm9-jrw8","type":"advisory","title":"Exploit"}],"epssScore":0.0049,"epssPercentile":0.40216,"nucleiTemplatePath":null,"nucleiSeverity":null,"enrichment":null,"publishedAt":"2026-09-25T17:17:12.943Z","addedAt":"2026-09-25T17:50:40.196Z","updatedAt":"2026-10-08T16:39:34.257Z","epssUpdatedAt":"2026-10-08T12:00:21.000Z","nucleiUpdatedAt":null,"links":[{"label":"NVD","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67409","note":"ingested from NVD"},{"label":"CVE Program","url":"https://www.cve.org/CVERecord?id=CVE-2026-67409","note":"authoritative record"}],"raw":{"id":"CVE-2026-67409","cveTags":[],"metrics":{"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-67409","role":"CISA 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From 3.13.0 until 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18, JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS (CWE-252). the JWKS key fetching mechanism in uaajwt.erl does not validate the HTTP response status code when downloading signing keys from the OAuth2 provider's JWKS endpoint. Non-200 responses (including 4xx and 5xx errors) are processed identically to successful responses. When the JWKS endpoint returns an error response with a valid-JSON body that lacks a keys field, all previously cached signing keys are destroyed, causing a persistent authentication denial of Files: deps/rabbitmqauthbackendoauth2/src/uaajwt.erl, lines 50-63 deps/rabbitmqauthbackendoauth2/src/uaajwks.erl, lines 5-7 deps/rabbitmqauthbackendoauth2/src/rabbitoauth2provider.erl, lines 98-107 Bug 1: HTTP status code ignored (uaajwt.erl:50-63): The Erlang httpc module returns {ok, {{HttpVersion, StatusCode, ReasonPhrase}, Headers, Body}}. The pattern {ok, {, , JwksBody}} matches ANY successful HTTP transaction Persistent authentication DoS: Once keys are destroyed, ALL OAuth2/JWT authentication fails for all users until a new successful JWKS refresh occurs Amplification: A single attacker can deny access to all legitimate OAuth2 users across the entire RabbitMQ. This issue is fixed in versions 4.3.3, 4.2.9, 4.1.14, 4.0.23, and 3.13.18."}],"lastModified":"2026-10-08T15:36:44.860","configurations":[{"nodes":[{"negate":false,"cpeMatch":[{"criteria":"cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*","vulnerable":true,"matchCriteriaId":"2FF356DE-889B-4728-AD67-5FC1622C285E","versionEndExcluding":"3.13.18","versionStartIncluding":"3.13.0"},{"criteria":"cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*","vulnerable":true,"matchCriteriaId":"D5D13FFE-E0D9-4199-B413-C75E4A525550","versionEndExcluding":"4.0.23","versionStartIncluding":"4.0.0"},{"criteria":"cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*","vulnerable":true,"matchCriteriaId":"D1298756-9945-4567-A288-410FAF5B54AE","versionEndExcluding":"4.1.14","versionStartIncluding":"4.1.0"},{"criteria":"cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*","vulnerable":true,"matchCriteriaId":"D35C2182-6B6E-4E76-98E7-6C928D64CCA8","versionEndExcluding":"4.2.9","versionStartIncluding":"4.2.0"},{"criteria":"cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*","vulnerable":true,"matchCriteriaId":"E6CDECF0-FDCF-4C38-AD9D-F7B1F1246AEB","versionEndExcluding":"4.3.3","versionStartIncluding":"4.3.0"}],"operator":"OR"}]}],"sourceIdentifier":"security-advisories@github.com"}}],"pagination":{"page":1,"limit":20,"total":1,"totalPages":1,"hasNext":false,"hasPrev":false}},"meta":{"apiVersion":"v1","requestedAt":"2026-10-08T23:45:10.348Z","durationMs":8,"filters":{"search":null,"severity":[],"type":[],"country":[],"tag":[],"cwe":[],"vendor":null,"product":null,"cve":"CVE-2026-67409","source":[],"days":null,"publishedAfter":null,"publishedBefore":null,"minCvss":null,"maxCvss":null,"minEpss":null,"knownExploited":null,"hasPatch":null,"hasNucleiTemplate":null},"sort":"newest","unknownParams":["include"],"warnings":[]}}