CVE-2026-49834

Published: Jul 17, 2026Modified: Jul 21, 2026

5.9

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability: 2.2 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-347

Improper Verification of Cryptographic Signature

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

References (4)

https://github.com/sigstore/sigstore-go/commit/dbb07e62623edd5b175fb9dd5a41dcb85a159207

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/pull/633

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/releases/tag/v1.2.0

Source: security-advisories@github.com

https://github.com/sigstore/sigstore-go/security/advisories/GHSA-9vcr-p3rj-q5q6

Source: security-advisories@github.com

Timeline

No history available yet.