CVE-2026-40923: Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines

Q: How do I fix CVE-2026-40923?

tekton pipelines: upgrade to 1.11.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-40923 being exploited?

CVE-2026-40923 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40923 affect?

CVE-2026-40923 affects tekton pipelines. Severity is medium (CVSS 5.4). 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 allow

Q: How urgent is CVE-2026-40923?

Priority 27/100. On your watchlist

Routine

MEDIUM 5.4WATCHLISTUPGRADE

CVE-2026-40923 is a medium-severity flaw (CVSS 5.4) affecting tekton pipelines. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 allows mounting volumes under restricted /tekton/ internal paths by using .. path traversal components. The restriction check uses strings.HasPrefix without filepath.Clean, so a path like /tekton/home/../results pas

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 21:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

linuxfoundation tekton pipelines UPGRADE

Affected: < 1.11.1

Fixed in: 1.11.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tekton-pipelines || rpm -q tekton-pipelines || tekton-pipelines --version

2. UPGRADE to 1.11.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tekton-pipelines

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tekton-pipelines

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40923?

tekton pipelines: upgrade to 1.11.1. Exact commands for each OS are on this page.

Is CVE-2026-40923 being exploited?

CVE-2026-40923 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40923 affect?

CVE-2026-40923 affects tekton pipelines. Severity is medium (CVSS 5.4). 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 allow

How urgent is CVE-2026-40923?

Priority 27/100. On your watchlist

Software pages

Kubernetes vulnerabilities

Related CVEs

CVE-2026-40924 MEDIUM 6.5 UPGRADE Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines
CVE-2026-25542 MEDIUM 6.5 UPGRADE Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines
CVE-2026-40938 HIGH 7.5 UPGRADE Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines
CVE-2026-40161 HIGH 7.7 UPGRADE Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines

References

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