CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NCVE-2026-31830
High (7.5) in sigstore sigstore. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in sigstore 0.2.3.
sigstore-ruby is a pure Ruby implementation of the sigstore verify command from the sigstore/cosign project. Prior to 0.2.3, Sigstore::Verifier#verify does not propagate the VerificationFailure returned by verify_in_toto when the artifact digest does not match the digest in the in-toto attestation subject. As a result, verification of DSSE bundles containing in-toto statements returns VerificationSuccess regardless of whether the artifact matches the attested subject. This vulnerability is fixed in 0.2.3.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-31)
- CWE
- CWE-252
- Published
- Modified
- Record from
- the NVD, synced
Affected
- sigstore:sigstore
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mhg6-2q2v-9h2c | RubyGems | sigstore | <0.2.3 | 0.2.3 |