low3.1
CVE-2026-54787
sigstore-go fails to check signature timestamps against a signing key's validity period
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/sigstore/sigstore-go | <= 1.2.0 | 1.2.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-wqqc-jjcq-vfxm
- https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm
- https://github.com/sigstore/sigstore-go/pull/642
- https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f
- https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1