CVE-2026-49834 – sigstore-go: Multi-log threshold bypass via single compromised log

CVE ID :CVE-2026-49834

Published : July 17, 2026, 7:20 p.m. | 18 minutes ago

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.

Severity: 0.0 | NA

Visit the link for more details, such as CVSS details, affected products, timeline, and more…