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  5. CVE-2026-54787

CVE-2026-54787: sigstore-go fails to check signature timestamps against a signing key's validity period

July 31, 2026

sigstore-go fails to check signature timestamps against a signing key’s validity period for self-managed long-lived keys without certificates.

References

  • github.com/advisories/GHSA-wqqc-jjcq-vfxm
  • github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f
  • github.com/sigstore/sigstore-go/pull/642
  • github.com/sigstore/sigstore-go/releases/tag/v1.2.1
  • github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm
  • nvd.nist.gov/vuln/detail/CVE-2026-54787

Code Behaviors & Features

Detect and mitigate CVE-2026-54787 with GitLab Dependency Scanning

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Affected versions

All versions before 1.2.1

Fixed versions

  • 1.2.1

Solution

Upgrade to version 1.2.1 or above.

Impact 3.1 LOW

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-324: Use of a Key Past its Expiration Date

Source file

go/github.com/sigstore/sigstore-go/CVE-2026-54787.yml

Spotted a mistake? Edit the file on GitLab.

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