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CVE-2026-40161

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CVE-2026-40161

Published: Apr 21, 2026

Modified: May 21, 2026

PUBLISHED

CVSS v3.1

7.7

HIGH

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.

VendorProductVersions

tektoncd

pipeline

affected
>= 1.0.0, < 1.0.2
affected
>= 1.2.0, < 1.3.4
affected
>= 1.4.0, < 1.6.2
affected
>= 1.7.0, < 1.9.3
affected
>= 1.10.0, < 1.11.1

Weaknesses (CWE)

CWE-201

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

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