sigstore-go: sigstore-go is a Go library for Sigstore signing and verification
CVE-2026-54787 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-54787, released August 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260827T195228-160000.1.1 | OPENSUSE-SU-2026:21761-1 | Sep 4, 2026 |
| govulncheck-vulndb · sles 16.0 | 0.0.20260827T195228-160000.1.1 | SUSE-SU-2026:23625-1 | Sep 4, 2026 |
| sigstore-go · Debian 14 | 1.2.1-1 | DEBIAN-CVE-2026-54787 | Aug 1, 2026 |
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