Improper Check for Unusual or Exceptional Conditions The advisory has been revoked - it doesn't affect any version of package golang-github-sigstore-cosign-v2 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN14-GOLANGGITHUBSIGSTORECOSIGNV2-16078234
- published16 Apr 2026
- disclosed7 Apr 2026
Introduced: 7 Apr 2026
CVE-2026-39395 (opens in a new tab)Amendment
The Debian security team deemed this advisory irrelevant for Debian:14.
NVD Description
Note: Versions mentioned in the description apply only to the upstream golang-github-sigstore-cosign-v2 package and not the golang-github-sigstore-cosign-v2 package as distributed by Debian.
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.