Vulnerability Description
sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188
- https://github.com/sigstore/sigstore-go/pull/642
- https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1
- https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm
- https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm
FAQ
What is CVE-2026-54787?
CVE-2026-54787 is a vulnerability with a CVSS score of 3.1 (LOW). sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-m...
How severe is CVE-2026-54787?
CVE-2026-54787 has been rated LOW with a CVSS base score of 3.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54787?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.