Missing Report of Error Condition Affecting github.com/sigstore/cosign/v2/cmd/cosign/cli/verify package, versions <2.6.3
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-GOLANG-GITHUBCOMSIGSTORECOSIGNV2CMDCOSIGNCLIVERIFY-15928848
- published8 Apr 2026
- disclosed7 Apr 2026
- creditkodareef5
Introduced: 7 Apr 2026
NewCVE-2026-39395 Â (opens in a new tab)How to fix?
Upgrade github.com/sigstore/cosign/v2/cmd/cosign/cli/verify to version 2.6.3 or higher.
Overview
Affected versions of this package are vulnerable to Missing Report of Error Condition in the verify-blob-attestation module when used without --check-claims flag. An attacker can cause the system to incorrectly report successful verification of attestations with malformed payloads or mismatched predicate types by submitting specially crafted payloads.