Is sigstore affected by CVE-2026-31830?

RubyGems sigstore is affected in <0.2.3.

Is CVE-2026-31830 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

high

CVE-2026-31830

Q: Is CVE-2026-31830 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

RubyGems · sigstore

Summary

sigstore-ruby verifier returns success for DSSE bundles with mismatched in-toto subject digest

Severity: high
EPSS: 0.2% (p12)
Also known as: GHSA-mhg6-2q2v-9h2c
Published: 2026-03-11

References

https://github.com/sigstore/sigstore-ruby/security/advisories/GHSA-mhg6-2q2v-9h2c
https://nvd.nist.gov/vuln/detail/CVE-2026-31830
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sigstore/CVE-2026-31830.yml

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.