CVE-2026-25542
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/tektoncd/pipeline | >= 0.43.0, < 1.0.2 | 1.0.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Tekton Pipelines | from 0.43.0 before 1.11.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rmx9-2pp3-xhcr
- https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr
- https://github.com/tektoncd/pipeline/commit/2c398711e6e9e232180508f0648425a8ea34dc9e
- https://github.com/tektoncd/pipeline/releases/tag/v1.11.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-25542
- https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a