Description

Cosign provides code signing and transparency for containers and binaries. Prior to 3.0.6 and 2.6.3, cosign verify-blob-attestation may erroneously report a "Verified OK" result for attestations with malformed payloads or mismatched predicate types. For old-format bundles and detached signatures, this was due to a logic flaw in the error handling of the predicate type validation. For new-format bundles, the predicate type validation was bypassed completely. This vulnerability is fixed in 3.0.6 and 2.6.3.

INFO

Published Date :

2026-04-07T20:06:28.798Z

Last Modified :

2026-04-08T15:49:16.587Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-39395 vulnerability.

Vendors Products
Sigstore
  • Cosign
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39395.

URL Resource
https://github.com/sigstore/cosign/security/advisories/GHSA-w6c6-c85g-mmv6 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-39395 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-39395 cve-icon
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