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Medium severity5.9OSV Advisory· Published Jul 17, 2026· Updated Jul 30, 2026

CVE-2026-49834

CVE-2026-49834

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/sigstore/sigstore-goGo
< 1.2.01.2.0

Affected products

143

Patches

Vulnerability mechanics

References

6

News mentions

0

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