CVE-2026-40161CWE-201

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

High · published April 21, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
36.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00428 · 36.1th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-04-21T16:26Z
EPSS history
Timeline
  • 21 APR 16:26Z
    Tekton Pipelines: Git resolver API mode leaks system-configured API token to user-controlled serverURL
    cvelistv5