CVE-2026-54787: CWE-324: Use of a Key Past its Expiration Date in sigstore sigstore-go
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.
CVE-2026-54787: CWE-324: Use of a Key Past its Expiration Date in sigstore sigstore-go
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 v3.1
Score 3.1low
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T23:23:57.714Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6d22c5bf32cb7a3471484c
Added to database: 07/31/2026, 22:33:41 UTC
Last updated: 07/31/2026, 22:33:41 UTC
Views: 1
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