{"id":"CVE-2026-62365","published":"2026-11-04T23:17:56.583","lastModified":"2026-11-04T23:17:56.583","description":"Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. DecodeWinevt in src/analysisd/decoders/winevtchannel.c accumulates unnamed Windows EventChannel Data element contents into the fixed 65,535-byte join_data heap buffer but passes the growing content length, rather than the OS_MAXSTR buffer capacity, as the snprintf size. An enrolled agent can submit an EventChannel message containing four maximum-sized unnamed Data elements, causing the fourth accumulation to write beyond join_data and corrupt adjacent heap metadata. The subsequent free of join_data2 causes the wazuh-analysisd process to terminate, stopping log ingestion for all agents handled by that manager. This vulnerability is fixed in 4.14.7.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-122"],"vendors":[],"products":[],"references":[{"url":"https://github.com/wazuh/wazuh/commit/07c5b2829f671eac0436412701a346a26555fdc7","tags":[]},{"url":"https://github.com/wazuh/wazuh/pull/37198","tags":[]},{"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.7","tags":[]},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-whhr-gxxr-f6pm","tags":[]}],"exploitRefs":[{"url":"https://github.com/wazuh/wazuh/commit/07c5b2829f671eac0436412701a346a26555fdc7","tags":[]},{"url":"https://github.com/wazuh/wazuh/pull/37198","tags":[]},{"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.7","tags":[]},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-whhr-gxxr-f6pm","tags":[]}],"hasPoc":true,"ai":null}