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CVE-2026-74877

Estado: AnalizadaAlta (8.7)—

openssl_encrypt versions before 1.4.0 contain a missing ownership verification vulnerability in the revoke_key method that allows authenticated clients to revoke any other client's key. Attackers can revoke arbitrary keys by providing a valid ML-DSA signature, bypassing the intended ownership restriction.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:L sin UI permite explotación remota autenticada de servicio (T1210). El atacante revoca claves ajenas, impactando control de cuentas (T1098.002) y disponibilidad (T1531: denegación de acceso legítimo).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramNetwork SegmentationMulti-factor Authentication

Tecnologías afectadas (1)

Jahlives — Openssl Encrypt

CWE

Referencias

JSON original (NVD)

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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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  "published": "2026-08-17T11:16:42.203",
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      "tags": [
        "Mitigation",
        "Vendor Advisory"
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    },
    {
      "url": "https://www.vulncheck.com/advisories/openssl-encrypt-before-missing-ownership-verification-via-revoke-key",
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    }
  ],
  "lastModified": "2026-08-31T15:50:55.453",
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