HIGHCVE-2026-40161Published Modified CNA GitHub_M
CVE-2026-40161: Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL
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.
Metrics
- CVSS v3.1
- 7.7
- Severity
- HIGH
- Fixed in
- —
- Affected Products
- 1
Affected packages
- tektoncd / pipeline>= 1.0.0, < 1.0.2 · >= 1.2.0, < 1.3.4 · >= 1.4.0, < 1.6.2 · >= 1.7.0, < 1.9.3 · >= 1.10.0, < 1.11.1
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N