Quickfire Cyber Bulletin June 5, 2026
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CVE-2026-40161

Low

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.

Scores & Signals

CVSS 3.1 7.7 — HIGH
EPSS score 0.0003 (9.5th percentile)
CISA KEV No
Affected Linuxfoundation Tekton Pipelines
Published 2026-04-21

Sources

External references

Risk scores are deterministic, based on public signals only. They are informational context, not a final verdict. Always consult vendor advisories before taking action.