CVE-2026-31830 affects sigstore-ruby versions prior to 0.2.3, where the Sigstore::Verifier#verify function incorrectly reports successful verification despite a mismatch between an artifact's digest and its in-toto attestation subject. This vulnerability is rated 7.5 HIGH (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N), indicating it is network-exploitable with low complexity, requiring no user interaction or privileges, and carries a high integrity impact by allowing malicious artifacts to appear legitimate. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.2.3CPE matchmatch criteria | cpe:2.3:a:sigstore:sigstore:*:*:*:*:*:ruby:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.