CVE-2026-25542: Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines

Routine

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2026-25542 is a medium-severity flaw (CVSS 6.5) 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 0.43.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, trusted resources verification policies match a resource source string (refSource.URI) against spec.resources[].pattern using regexp.MatchString. In Go, regexp.MatchString reports a match if the pattern matches anywhere in the string, so common unanchored patterns (incl

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-185
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 17:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

linuxfoundation tekton pipelines UPGRADE

Affected: >= 0.43.0 and < 1.11.0

Fixed in: 1.11.0

Safe to downgrade to: a release before 0.43.0

1. Check installed version

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

2. UPGRADE to 1.11.0 (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.

3. If no update is available yet, DOWNGRADE to a release before 0.43.0 (Debian / Ubuntu)

apt-cache madison tekton-pipelines sudo apt install tekton-pipelines=<VERSION_BEFORE_0.43.0> sudo apt-mark hold tekton-pipelines

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tekton-pipelines sudo dnf downgrade tekton-pipelines-<VERSION_BEFORE_0.43.0> sudo dnf versionlock add tekton-pipelines

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-25542?

tekton pipelines: upgrade to 1.11.0. Exact commands for each OS are on this page.

Is CVE-2026-25542 being exploited?

CVE-2026-25542 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-2026-25542 affect?

CVE-2026-25542 affects tekton pipelines. Severity is medium (CVSS 6.5). Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 0.43.0 and prior to versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1, trusted resources verification policies match a resource sou

How urgent is CVE-2026-25542?

Priority 37/100. Public exploit reference; 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-2026-40923 MEDIUM 5.4 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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