CVE-2026-54787
Published: Fri, 31 Jul 2026 23:17
Summary
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
Details
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.
Are YOU affected by CVE-2026-54787?
5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether CVE-2026-54787 (and any other live CVE) applies. Anonymous, no signup.
curl https://mindsparkstack.com/scan.sh | bash
References
- https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f
- 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
StackPatch runs this match against YOUR installed packages every hour
Free (3 servers) / from $9/mo (14-day free trial) / Solo $9/mo / Pro $29/mo / Team $79/mo. Indie pricing.