{"affected":[{"product":"aedes","source":"CNA: GitHub_M","vendor":"moscajs","versions":[{"status":"affected","version":"< 1.1.1"}]},{"ecosystem":"npm","packageName":"aedes","product":"aedes","source":"GitHub GHSA-xxqp-5qx8-gj5q","vendor":"","versions":[{"status":"affected","version":"<= 1.1.0","versionType":"GitHub advisory range"}]}],"cveId":"CVE-2026-63341","cwes":["CWE-248","CWE-400"],"description":"Aedes is an MQTT broker that can run on any stream server. Prior to 1.1.1, the MQTT broker does not bound topic depth or structural complexity before passing topics through `mqemitter` into `qlobber`. A `PUBLISH`, `SUBSCRIBE`, or registered `Will` message containing an excessively deep topic can reach `qlobber._split_words` in `lib/qlobber.js` and trigger an uncaught `too many words` exception. Calls from `handlers/subscribe.js` and the publishing logic are not protected against that exception, so it escapes to the `Node.js event loop` and terminates the entire broker. The `Will` path is independently reachable when a client disconnects ungracefully: it calls `broker.publish` directly and bypasses the `PUBLISH` handler. An attacker must be able to establish an `MQTT session`, authenticated or unauthenticated according to broker configuration. A successful attack disconnects all legitimate clients and prevents reconnection until the broker process restarts. This issue is fixed in version 1.1.1.","epss":{"date":"2026-11-04","percentile":0.30463,"score":0.00365},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"}],"kev":null,"metrics":[{"score":7.5,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":7.5,"severity":"high","source":"NVD: security-advisories@github.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793847431142,"publishedAt":1793398190280,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/moscajs/aedes/commit/b9024faa4cb416c4c6980760b4d7f55336315f2d"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/moscajs/aedes/releases/tag/v1.1.1"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/moscajs/aedes/commit/b9024faa4cb416c4c6980760b4d7f55336315f2d"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/moscajs/aedes/releases/tag/v1.1.1"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"},{"source":"GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"}],"remediation":[{"kind":"fix","source":"GitHub GHSA-xxqp-5qx8-gj5q","text":"aedes (npm): GitHub reports patched versions 1.1.1. Check the advisory for the affected release branch.","url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"}],"revision":"6cdfa7b470c43c7b7ff708ffd2584068bbd7df611e1f382d842a954b65d83fea","sources":[{"modifiedAt":1793847431142,"name":"CNA: GitHub_M","retrievedAt":1793848283740,"url":"https://www.cve.org/CVERecord?id=CVE-2026-63341"},{"modifiedAt":1793648133347,"name":"NVD","retrievedAt":1793665723435,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63341"},{"modifiedAt":1784228620000,"name":"GitHub Security Advisories","retrievedAt":1793753409697,"url":"https://github.com/moscajs/aedes/security/advisories/GHSA-xxqp-5qx8-gj5q"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793848343415,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-63341"}],"ssvc":{"assessedAt":1793847408899,"automatable":"yes","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Aedes has Uncaught Exception and Uncontrolled Resource Consumption","updatedAt":1793848343415}