Improper Validation of Array Index Affecting gitsign package, versions <0.16.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-GITSIGN-16749826
- published18 May 2026
- disclosed15 May 2026
Introduced: 15 May 2026
CVE-2026-44310 (opens in a new tab)How to fix?
Upgrade Debian:unstable gitsign to version 0.16.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gitsign package and not the gitsign package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.