CVE-2026-49834

NameCVE-2026-49834
Descriptionsigstore-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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
sigstore-go (PTS)trixie0.7.1-2vulnerable
forky, sid1.2.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sigstore-gosource(unstable)1.2.1-1

Notes

https://github.com/sigstore/sigstore-go/security/advisories/GHSA-9vcr-p3rj-q5q6
https://github.com/sigstore/sigstore-go/pull/633
Fixed by: https://github.com/sigstore/sigstore-go/commit/dbb07e62623edd5b175fb9dd5a41dcb85a159207 (v1.2.0)
Search for package or bug name: Reporting problems