Incorrect Regular Expression Affecting tekton-chains package, versions <0.27.0-r0
Threat Intelligence
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Test your applications- Snyk IDSNYK-WOLFILATEST-TEKTONCHAINS-17112417
- published31 May 2026
- disclosed21 Apr 2026
Introduced: 21 Apr 2026
CVE-2026-25542 (opens in a new tab)How to fix?
Upgrade Wolfi tekton-chains to version 0.27.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tekton-chains package and not the tekton-chains package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. From 0.43.0 to 1.11.0, trusted resources verification policies match a resource source string (refSource.URI) against spec.resources[].pattern using regexp.MatchString. In Go, regexp.MatchString reports a match if the pattern matches anywhere in the string, so common unanchored patterns (including examples in tekton documentation) can be bypassed by attacker-controlled source strings that contain the trusted pattern as a substring. This can cause an unintended policy match and change which verification mode/keys apply.