Secuno
ENNL
Book demo

CVE-2026-40938

Linuxfoundation Tekton Pipelines vulnerability

7.5 HIGHPublic exploitEPSS 0.90%
  1. Published21 Apr 2026

Description

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 git resolver's revision parameter is passed directly as a positional argument to git fetch without any validation that it does not begin with a - character. Because git parses flags from mixed positional arguments, an attacker can inject arbitrary git fetch flags such as --upload-pack=<binary>. Combined with the validateRepoURL function explicitly permitting URLs that begin with / (local filesystem paths), a tenant who can submit ResolutionRequest objects can chain these two behaviors to execute an arbitrary binary on the resolver pod. The tekton-pipelines-resolvers ServiceAccount holds cluster-wide get/list/watch on all Secrets, so code execution on the resolver pod enables full cluster-wide secret exfiltration. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linuxfoundation Tekton Pipelines≥ 1.0.0 < 1.11.0

Remediation

Fixed in
Linuxfoundation Tekton Pipelines≥ 1.11.0

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1089299.9
A flaw has been found in Netcore NR268 1.7.121109. The affected element is the function…
CVE-2026-1089638.8
databasement before 1.8.2 allows remote code execution because it runs certain commands…
CVE-2026-194828.8
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0…
CVE-2026-187408.8
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0…
CVE-2026-1076398.8
ILIAS before 9.24, 10.x before 10.12 and 11.x before 11.5 contains an argument…
CVE-2026-1075109.1
An authenticated high privilege user can inject arguments in troubleshooting commands…

Frequently asked

Is CVE-2026-40938 being actively exploited?

CVE-2026-40938 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.90%.

How severe is CVE-2026-40938?

CVE-2026-40938 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.90% probability of exploitation.

Which products are affected by CVE-2026-40938?

Affected products include Linuxfoundation Tekton Pipelines.

How do I fix CVE-2026-40938?

Upgrade affected software to a fixed version, for example Linuxfoundation Tekton Pipelines 1.11.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40938 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.