CVE-2026-40161
Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL
CVSS Score
7.7
EPSS Score
0.0%
EPSS Percentile
9th
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.
| CWE | CWE-201 |
| Vendor | tektoncd |
| Product | pipeline |
| Published | Apr 21, 2026 |
| Last Updated | May 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
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