high7.7
CVE-2026-40161
Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL
Impact
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, the Tekton Pipelines git resolver in API mode sends the system-configured Git API token to a user-controlled serverURL when the user omits the token parameter. A tenant with TaskRun or PipelineRun create permission can exfiltrate the shared API token (GitHub PAT, GitLab token, etc.) by pointing serverURL to an attacker-controlled endpoint. 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 | >= 1.0.0, < 1.0.2 | 1.0.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Tekton Pipelines | from 1.0.0 through 1.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-wjxp-xrpv-xpff
- https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff
- https://nvd.nist.gov/vuln/detail/CVE-2026-40161
- https://github.com/tektoncd/pipeline/issues/9608
- https://github.com/tektoncd/pipeline/issues/9609