CVE-2026-40161: Linuxfoundation Tekton Pipelines

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Linuxfoundation Tekton Pipelines: from 1.0.0, up to and including 1.10.0

Published 2026-04-21. Last modified 2026-06-17.