CVE-2026-45798

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{"affected": [{"affectedData": [{"product": "wazuh", "vendor": "wazuh", "versions": [{"status": "affected", "version": ">= 4.5.0, < 4.14.6"}, {"status": "affected", "version": ">= 5.0.0-beta1, < 5.0.0-beta2"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "matchCriteriaId": "50BFCF2D-8F21-4480-9D9C-DA0F5364B94F", "versionEndExcluding": "4.14.6", "versionStartIncluding": "4.5.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*", "matchCriteriaId": "007B01AA-AED0-4E92-8999-07E74B630460", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2."}, {"lang": "es", "value": "Wazuh es una plataforma de c\u00f3digo abierto y gratuita utilizada para la prevenci\u00f3n, detecci\u00f3n y respuesta a amenazas. Desde 4.5.0 hasta 4.14.6 y 5.0.0-beta2, compare_wazuh_versions() en src/shared/version_op.c copia el campo V: de inscripci\u00f3n controlado por el atacante en un b\u00fafer de pila de 10 bytes con strncpy() pero no termina expl\u00edcitamente el b\u00fafer. La funci\u00f3n es accesible antes de la autenticaci\u00f3n a trav\u00e9s de wazuh-authd en el puerto TCP 1515 cuando la inscripci\u00f3n TLS an\u00f3nima est\u00e1 habilitada. Una cadena de versi\u00f3n de al menos nueve bytes no nulos puede hacer que strchr() y strtok() lean m\u00e1s all\u00e1 de ver2 y puede hacer que strtok() escriba un byte nulo en la memoria de pila adyacente, permitiendo una denegaci\u00f3n de servicio remota. Este problema est\u00e1 solucionado en las versiones 4.14.6 y 5.0.0-beta2."}], "id": "CVE-2026-45798", "lastModified": "2026-10-26T11:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45798", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T17:17:27.587788Z", "version": "2.0.3"}}]}, "published": "2026-08-19T17:18:49.730", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/wazuh/wazuh/pull/36059"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Release Notes"], "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.6"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Release Notes"], "url": "https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}, {"lang": "en", "value": "CWE-170"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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