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CVE-2026-59099

Estado: Pendiente de análisisCrítica (9.3)—

Apereo CAS 7.3.0 before 8.0.0-RC6 contains a cryptographic vulnerability that allows remote unauthenticated attackers to recover plaintext conversation state by exploiting AES-GCM initialization vector reuse across the server lifetime. Attackers can collect multiple client-side webflow execution tokens from the unauthenticated login page and perform known-plaintext analysis to decrypt the webflow conversation state due to keystream reuse caused by a fixed all-zero IV paired with the same encryption key.

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.

Acceso remoto sin autenticación a servicio web (AV:N, PR:N, UI:N) expone tokens y datos de sesión mediante reutilización de IV en AES-GCM, permitiendo recuperar estado de conversación cifrado.

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

Application Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer GuidanceVulnerability ScanningUser Training

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Apereo — CASAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-59099",
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          "id": "CVE-2026-59099",
          "role": "CISA Coordinator",
          "options": [
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              "automatable": "yes"
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            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-07-06T12:29:20.364889Z"
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    "cvssMetricV31": [
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          "integrityImpact": "HIGH",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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              "versionType": "custom"
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          "packageURL": "pkg:github/apereo/cas",
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  "published": "2026-07-02T20:17:08.240",
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      "url": "https://github.com/apereo/cas/commit/22c6f4adf738852782309b523b4e80371057f2d0",
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      "url": "https://github.com/geo-chen/oss/blob/main/cas.md",
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      "lang": "en",
      "value": "Apereo CAS 7.3.0 before 8.0.0-RC6 contains a cryptographic vulnerability that allows remote unauthenticated attackers to recover plaintext conversation state by exploiting AES-GCM initialization vector reuse across the server lifetime. Attackers can collect multiple client-side webflow execution tokens from the unauthenticated login page and perform known-plaintext analysis to decrypt the webflow conversation state due to keystream reuse caused by a fixed all-zero IV paired with the same encryption key."
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  ],
  "lastModified": "2026-07-14T23:17:33.830",
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}