CVE-2026-40161: Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines

Routine

HIGH 7.7WATCHLISTUPGRADE

CVE-2026-40161 is a high-severity flaw (CVSS 7.7) 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, 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

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
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-201
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 21:10 UTCUpdated Record last modified

linuxfoundation tekton pipelines UPGRADE

Affected: >= 1.0.0 and <= 1.10.0

Fixed in: newer than 1.10.0

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to newer than 1.10.0 (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 1.0.0 (Debian / Ubuntu)

apt-cache madison tekton-pipelines sudo apt install tekton-pipelines=<VERSION_BEFORE_1.0.0> 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_1.0.0> 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-2026-40161?

tekton pipelines: upgrade to newer than 1.10.0. Exact commands for each OS are on this page.

Is CVE-2026-40161 being exploited?

CVE-2026-40161 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-2026-40161 affect?

CVE-2026-40161 affects tekton pipelines. Severity is high (CVSS 7.7). 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 syste

How urgent is CVE-2026-40161?

Priority 36/100. High severity; On your watchlist

Software pages

Kubernetes vulnerabilities · GitLab vulnerabilities · GitHub vulnerabilities · Git 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-2026-40923 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

References

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