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CVE-2026-49834

Estado: AnalizadaAlta (7.5)—

sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.0, a verifier configured with WithTransparencyLog(N>1) or WithSignedCertificateTimestamps(N>1) counts verified witnesses per entry or per validation path rather than per log authority, allowing a single compromised transparency log or CT log to satisfy multi-log threshold requirements and defeat the multi-log policy. This issue is fixed in version 1.2.0.

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.

Vulnerabilidad en librería expuesta (sigstore-go) accesible por red sin autenticación (AV:N PR:N UI:N) que permite eludir validación de firma de múltiples logs, comprometiendo integridad de verificación criptográfica (CWE-347, I:H).

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 ManagementVulnerability ScanningRestrict File and Directory PermissionsRestrict Registry PermissionsRemote Data StorageNetwork Segmentation

Tecnologías afectadas (1)

Sigstore — Sigstore-go

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-49834",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "role": "CISA Coordinator",
          "options": [
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            },
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          ],
          "version": "2.0.3",
          "timestamp": "2026-07-17T19:42:04.325650Z"
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    }
  ],
  "lastModified": "2026-07-30T13:18:22.090",
  "configurations": [
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