{"id":"UBUNTU-CVE-2026-44310","details":"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.","modified":"2026-07-02T18:03:14.007988866Z","published":"2026-05-15T17:16:00Z","upstream":["CVE-2026-44310"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44310"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44310"},{"type":"REPORT","url":"https://github.com/sigstore/gitsign/security/advisories/GHSA-7c37-gx6w-8vc5"}],"affected":[{"package":{"name":"gitsign","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/gitsign?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.0-4","0.13.0-1","0.13.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.13.0-2","binary_name":"gitsign"},{"binary_name":"golang-github-sigstore-gitsign-dev","binary_version":"0.13.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44310.json"}},{"package":{"name":"gitsign","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/gitsign?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13.0-2","0.13.0-3","0.13.0-4","0.13.0-4ubuntu0.26.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"gitsign","binary_version":"0.13.0-4ubuntu0.26.04.1~esm1"},{"binary_name":"golang-github-sigstore-gitsign-dev","binary_version":"0.13.0-4ubuntu0.26.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44310.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]}