PT-2026-34008 · Unknown · Tekton Pipelines

Published 2026-04-21 · Updated 2026-05-21 · CVE-2026-40161

Positive Technologies (AI Summary)

CVSS v3.1

7.7

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Tekton Pipelines versions 1.0.0 through 1.10.0

Description The git resolver in API mode sends the system-configured Git API token to a user-controlled 'serverURL' when the token parameter is omitted. A tenant with TaskRun or PipelineRun create permissions can exfiltrate shared API tokens, such as GitHub PAT or GitLab tokens, by directing 'serverURL' to an attacker-controlled endpoint.

Recommendations Update Tekton Pipelines to a version later than 1.10.0.

Fix

Weakness Enumeration

CWE-201

Related Identifiers

CVE-2026-40161

GHSA-WJXP-XRPV-XPFF

Affected Products

Tekton Pipelines

References · 10

• https://github.com/tektoncd/pipeline/security/advisories/GHSA-wjxp-xrpv-xpff · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-wjxp-xrpv-xpff · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40161 · Security Note
• https://github.com/tektoncd/pipeline · Note
• https://github.com/tektoncd/pipeline/issues/9608 · Note
• https://github.com/tektoncd/pipeline/issues/9609 · Note
• https://t.me/cveNotify/164472 · Telegram Post
• https://twitter.com/pulsepatchio/status/2046785857638772806 · Twitter Post
• https://twitter.com/_cvereports/status/2049063847349059856 · Twitter Post
• https://twitter.com/CVEnew/status/2046636245384610253 · Twitter Post