Vulnerability Description
Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifies the certificate chain using the leaf certificate's "not before" timestamp and later checks expiry of the leaf certificate using either a signed timestamp provided by the Rekor transparency log or from a timestamp authority, or using the current time. The root and all issuing certificates are assumed to be valid during the leaf certificate's validity. There is no impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. This issue has been fixed in version 3.0.5.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sigstore | Cosign | < 3.0.5 |
Related Weaknesses (CWE)
References
- https://github.com/sigstore/cosign/commit/3c9a7363f563db76d78e2de2cabd945450f378Patch
- https://github.com/sigstore/cosign/releases/tag/v3.0.5ProductRelease Notes
- https://github.com/sigstore/cosign/security/advisories/GHSA-wfqv-66vq-46rmExploitVendor Advisory
FAQ
What is CVE-2026-24122?
CVE-2026-24122 is a vulnerability with a CVSS score of 3.7 (LOW). Cosign provides code signing and transparency for containers and binaries. In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be consider...
How severe is CVE-2026-24122?
CVE-2026-24122 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-24122?
Check the references section above for vendor advisories and patch information. Affected products include: Sigstore Cosign.