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CVE-2026-40161

Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL

Published: Apr 21, 2026Updated: May 21, 2026 Sources: CVE List NVDCWE-201
NVD MITRE
7.7CVSSHIGH
EPSS Score
0.3%
Top 82.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-201NVD-CWE-noinfo

Affected Products

tekton pipelineslinuxfoundation
Mixed
AI / ML / ml-framework
pipelinetektoncd
On-prem
DevTools & CI / ci-cd
linuxfoundationoss-projectUSAI / MLaka yocto, pytorch, everest
tektoncdoss-projectDevTools & CIaka tekton cd, tekton-cd

Exploitability

Official Patch Available

References

https://github.com/tektoncd/pipeline/issues/9608
github.com
https://github.com/tektoncd/pipeline/issues/9609
github.com
https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff
github.com

Timeline

Published
Apr 21, 2026
Last Updated
May 21, 2026

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