Improper Certificate Validation Affecting goreleaser package, versions <2.15.3-r1
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-CHAINGUARDLATEST-GORELEASER-16096187
- published17 Apr 2026
- disclosed15 Apr 2026
Introduced: 15 Apr 2026
NewCVE-2026-39984 (opens in a new tab)How to fix?
Upgrade Chainguard goreleaser to version 2.15.3-r1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream goreleaser package and not the goreleaser package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in the VerifyTimestampResponse function. VerifyTimestampResponse correctly verifies the certificate chain signature, but the TSA-specific constraint checks in VerifyLeafCert uses the first non-CA certificate from the PKCS#7 certificate bag instead of the leaf certificate from the verified chain. An attacker can exploit this by prepending a forged certificate to the certificate bag while the message is signed with an authorized key, causing the library to validate the signature against one certificate but perform authorization checks against another. This vulnerability only affects users of the timestamp-authority/v2/pkg/verification package and does not affect the timestamp-authority service itself or sigstore-go. The issue has been fixed in version 2.0.6.