What is CVE-2026-40923?

CVE-2026-40923 is a medium-severity vulnerability in Linuxfoundation Tekton_pipelines, classified under Path Traversal. CVSS score: 5.4/10. Published 2026-04-21.

How severe is CVE-2026-40923?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Path Traversal in Linuxfoundation Tekton_pipelines

CVE-2026-40923

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, a validation bypass in the VolumeMount path restriction allo…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (16.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Linuxfoundation Tekton_pipelines
Tektoncd Pipeline — versions >= 1.4.0, < 1.6.2, >= 1.2.0, < 1.3.4, >= 1.7.0, < 1.9.3

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-40923?: CVE-2026-40923 is a medium-severity vulnerability in Linuxfoundation Tekton_pipelines, classified under Path Traversal. CVSS score: 5.4/10. Published 2026-04-21.
How severe is CVE-2026-40923?: Medium severity. CVSS v3 base score is 5.4 out of 10.