{"id":"CVE-2026-44310","sourceIdentifier":"security-advisories@github.com","published":"2026-05-15T17:16:47.430","lastModified":"2026-06-17T10:50:28.823","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. From 0.4.0 to before 0.15.0, CertVerifier.Verify() in pkg/git/verifier.go unconditionally dereferences certs[0] after sd.GetCertificates() without checking the slice length. A CMS/PKCS7 signed message with an empty certificate set is a structurally valid DER payload; GetCertificates() returns an empty slice with no error, causing an immediate index-out-of-range panic. On the gitsign --verify code path (the GPG-compatible mode invoked by git verify-commit), the panic is silently recovered by internal/io/streams.go's Wrap() function, which returns nil instead of an error. main.go then exits with code 0, causing exit-code-only verification callers to interpret the failed verification as success. This vulnerability is fixed in 0.15.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"sigstore","product":"gitsign","versions":[{"version":">= 0.4.0, < 0.15.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-15T16:44:32.980771Z","id":"CVE-2026-44310","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-129"},{"lang":"en","value":"CWE-390"}]}],"references":[{"url":"https://github.com/sigstore/gitsign/security/advisories/GHSA-7c37-gx6w-8vc5","source":"security-advisories@github.com"},{"url":"https://github.com/sigstore/gitsign/security/advisories/GHSA-7c37-gx6w-8vc5","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}