CVE-2026-54787
sigstore-go fails to check signature timestamps against a signing key's validity period
- State
- Published
- Severity
- 3.1 Low
- Published
- Jul 31, 2026
- Updated
- Jul 31, 2026
- Reserved
- Jun 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.1 Low | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N | GitHub_M |
Weaknesses
- CWE-324 Use of a Key Past its Expiration Date
Affected Products
| Product | Versions |
|---|---|
sigstore-gosigstore |
|
References
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.