{"timestamp":"2026-04-21T16:48:04.873157Z","id":"CVE-2026-25542","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"tektoncd","product":"pipeline","versions":[{"version":">= 0.43.0, < 1.0.2","status":"affected"},{"version":">= 1.2.0, < 1.3.4","status":"affected"},{"version":">= 1.4.0, < 1.6.2","status":"affected"},{"version":">= 1.7.0, < 1.9.3","status":"affected"},{"version":">= 1.10.0, < 1.11.1","status":"affected"}]}]

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.

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 0.43.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, 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. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.

OR
          *cpe:2.3:a:linuxfoundation:tekton_pipelines:*:*:*:*:*:go:*:* versions from (including) 0.43.0 up to (excluding) 1.11.0

GitHub, Inc.: https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a Types: Patch

GitHub, Inc.: https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr Types: Exploit, Vendor Advisory

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.

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CWE-185

https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a

https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr