What’s Vulnerable › Vulnerabilities

CVE-2023-47122: Gitsign's Rekor public keys fetched from upstream API instead of local TUF client.

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-10 · updated 2026-06-17
• Weakness: CWE-347

Description

Gitsign is software for keyless Git signing using Sigstore. In versions of gitsign starting with 0.6.0 and prior to 0.8.0, Rekor public keys were fetched via the Rekor API, instead of through the local TUF client. If the upstream Rekor server happened to be compromised, gitsign clients could potentially be tricked into trusting incorrect signatures. There is no known compromise the default public good instance (`rekor.sigstore.dev`) - anyone using this instance is unaffected. This issue was fixed in v0.8.0. No known workarounds are available.

Affected products

• sigstore gitsign: from 0.6.0 before 0.8.0 — fixed in 0.8.0

How to fix

Upgrade to a fixed version: sigstore gitsign 0.8.0. Check the vendor advisory for mitigations.

References

• https://docs.sigstore.dev/about/threat-model/#sigstore-threat-model
• https://github.com/sigstore/gitsign/commit/cd66ccb03c86a3600955f0c15f6bfeb75f697236
• https://github.com/sigstore/gitsign/pull/399
• https://github.com/sigstore/gitsign/security/advisories/GHSA-xvrc-2wvh-49vc
• https://docs.sigstore.dev/about/threat-model/#sigstore-threat-model
• https://github.com/sigstore/gitsign/commit/cd66ccb03c86a3600955f0c15f6bfeb75f697236
• https://github.com/sigstore/gitsign/pull/399
• https://github.com/sigstore/gitsign/security/advisories/GHSA-xvrc-2wvh-49vc

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