VULNERABILITY INTELLIGENCE

CVE-2026-49834

CVSS score5.9 MEDIUM
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-07-17
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-347

Primary references