CVE-2026-44310 Details
Description
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.
A vulnerability exists in Gitsign versions 0.4.0 prior to 0.15.0, where the certificate verification process in 'pkg/git/verifier.go' improperly handles empty certificate sets. The 'CertVerifier.Verify()' function unconditionally accesses 'certs[0]' after calling 'sd.GetCertificates()', without verifying the length of the returned slice. This oversight leads to an 'index out of range' panic when a CMS/PKCS7 signed message is received with no certificates, a scenario that is structurally valid but not properly managed. In GPG-compatible mode, this panic is silently caught and converted into a nil error, causing the program to exit with a success code, misleading verification processes that rely solely on exit codes.
Users can upgrade to Gitsign version 0.15.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 15, 2026CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/sigstore/gitsign/security/advisories/GHSA-7c37-gx6w-8vc5 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/sigstore/gitsign/security/advisories/GHSA-7c37-gx6w-8vc5 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-129 | Improper Validation of Array Index | [email protected] |
| CWE-390 | Detection of Error Condition Without Action | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| sigstore gitsign | >= v0.4.0 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | New CVE Received | [email protected] |
| May 15, 2026 | CVE Modified | CISA-ADP |