{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-62365", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-13T22:04:59.677Z", "datePublished": "2026-11-04T22:46:40.298Z", "dateUpdated": "2026-11-04T22:46:40.298Z"}, "containers": {"cna": {"title": "Wazuh: Heap Buffer Overflow in DecodeWinevt() join_data Accumulation via Crafted EventChannel XML", "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "lang": "en", "description": "CWE-122: Heap-based Buffer Overflow", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/wazuh/wazuh/security/advisories/GHSA-whhr-gxxr-f6pm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-whhr-gxxr-f6pm"}, {"name": "https://github.com/wazuh/wazuh/pull/37198", "tags": ["x_refsource_MISC"], "url": "https://github.com/wazuh/wazuh/pull/37198"}, {"name": "https://github.com/wazuh/wazuh/commit/07c5b2829f671eac0436412701a346a26555fdc7", "tags": ["x_refsource_MISC"], "url": "https://github.com/wazuh/wazuh/commit/07c5b2829f671eac0436412701a346a26555fdc7"}, {"name": "https://github.com/wazuh/wazuh/releases/tag/v4.14.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.7"}], "affected": [{"vendor": "wazuh", "product": "wazuh", "versions": [{"version": ">= 3.9.0, < 4.14.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-04T22:46:40.298Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-whhr-gxxr-f6pm", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "wazuh", "vendor": "wazuh", "versions": [{"status": "affected", "version": ">= 3.9.0, < 4.14.7"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-62365", "lastModified": "2026-11-04T23:17:56.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-11-04T23:17:56.583", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/wazuh/wazuh/commit/07c5b2829f671eac0436412701a346a26555fdc7"}, {"source": "security-advisories@github.com", "url": "https://github.com/wazuh/wazuh/pull/37198"}, {"source": "security-advisories@github.com", "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-whhr-gxxr-f6pm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}