CVE-2026-44310— gitsign --verify panics on empty-certificate PKCS7 and exits 0, bypassing exit-code callers
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-44310
Vulnerability Information
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Vulnerability Title
gitsign --verify panics on empty-certificate PKCS7 and exits 0, bypassing exit-code callers
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
对数组索引的验证不恰当
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44310
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- https://github.com/sigstore/gitsign/security/advisories/GHSA-7c37-gx6w-8vc5x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44310
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V. Comments for CVE-2026-44310
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