CVE-2026-25771

{"id": "CVE-2026-25771", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-03-17T19:16:01.083", "references": [{"url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-33w3-p5hm-jw7g", "tags": ["Exploit", "Vendor Advisory", "Mitigation"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-400"}]}], "descriptions": [{"lang": "en", "value": "Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.3.0 and prior to version 4.14.3, a Denial of Service (DoS) vulnerability exists in the Wazuh API authentication middleware (`middlewares.py`). The application uses an asynchronous event loop (Starlette/Asyncio) to call a synchronous function (`generate_keypair`) that performs blocking disk I/O on every request containing a Bearer token. An unauthenticated remote attacker can exploit this by flooding the API with requests containing invalid Bearer tokens. This forces the single-threaded event loop to pause for file read operations repeatedly, starving the application of CPU resources and potentially preventing it from accepting or processing legitimate connections. Version 4.14.3 fixes the issue."}, {"lang": "es", "value": "Wazuh es una plataforma de c\u00f3digo abierto y gratuita utilizada para la prevenci\u00f3n, detecci\u00f3n y respuesta a amenazas. A partir de la versi\u00f3n 4.3.0 y antes de la versi\u00f3n 4.14.3, existe una vulnerabilidad de denegaci\u00f3n de servicio (DoS) en el middleware de autenticaci\u00f3n de la API de Wazuh ('middlewares.py'). La aplicaci\u00f3n utiliza un bucle de eventos as\u00edncrono (Starlette/Asyncio) para llamar a una funci\u00f3n s\u00edncrona ('generate_keypair') que realiza operaciones de E/S de disco bloqueantes en cada solicitud que contiene un token Bearer. Un atacante remoto no autenticado puede explotar esto inundando la API con solicitudes que contienen tokens Bearer no v\u00e1lidos. Esto fuerza al bucle de eventos de un solo hilo a pausar repetidamente para operaciones de lectura de archivos, privando a la aplicaci\u00f3n de recursos de CPU y potencialmente impidiendo que acepte o procese conexiones leg\u00edtimas. La versi\u00f3n 4.14.3 corrige el problema."}], "lastModified": "2026-03-19T14:58:04.800", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3DE4B654-CEBE-4CAC-9687-05CFD8F7CEC8", "versionEndExcluding": "4.14.3", "versionStartIncluding": "4.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}