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CVE-2026-86452

Estado: ModificadaAlta (8.7)—

Affected versions of MISP permit unauthenticated or weakly constrained request paths to perform persistent work without adequate input bounds or rate limiting.

The users/forgot password-reset endpoint accepted an attacker-controlled email value without first imposing a reasonable length bound or validating its format. That value was then used to create an audit log entry and queue a password-reset job, causing the supplied value to be persisted more than once per request. The commit explicitly states that an unbounded unauthenticated request field was stored twice per call with no throttle.

The fix adds:

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The new flood filter is specifically intended to limit persistent storage costs from anonymous requests such as password resets, registrations, and failed REST authentication attempts.

Version affected: ≤2.5.45

Detalles técnicos trazas, registros y código del informe original
 - a maximum email input length of 1024 bytes;
 - email-format validation before persistent work;
 - a per-source pre-authentication request budget;
 - HTTP 429 responses when that budget is exceeded;
 - a 15-minute cooldown for API-access request emails;
 - POST-only handling and CSRF protection for the API-access request endpoint.

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.

Endpoint sin autenticación (AV:N/PR:N) aceptaba valor no validado de email sin límite de longitud, causando almacenamiento persistente repetido; comportamiento compatible con DoS de recursos (CWE-400, CWE-770).

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Misp-project — Misp

CWE

Referencias

JSON original (NVD)

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