CVE-2026-40161

7.7 HIGH

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines

Published: 2026-04-21 · Last updated: 2026-05-21

Severity and scoring

CVSS: 7.7 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE: CWE-201

Affected products

Vendor	Product
linuxfoundation	tekton_pipelines

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-40161
[Other]https://github.com/tektoncd/pipeline/issues/9608
[Other]https://github.com/tektoncd/pipeline/issues/9609
[Vendor advisory]https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff

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