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Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M

CVE-2026-40938Tekton Pipelines: Git Resolver Unsanitized Revision Parameter Enables git Argument Injection Leading to RCE

High 7.5

In plain English

A high-severity argument injection in pipeline from tektoncd. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.8%top 43.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/tektoncd/pipeline1.11.1GHSA-94jr-7pqp-xhcq
Gogithub.com/tektoncd/pipeline1.9.3GHSA-94jr-7pqp-xhcq
Gogithub.com/tektoncd/pipeline1.6.2GHSA-94jr-7pqp-xhcq
Gogithub.com/tektoncd/pipeline1.3.4GHSA-94jr-7pqp-xhcq
Gogithub.com/tektoncd/pipeline1.0.2GHSA-94jr-7pqp-xhcq
Gogithub.com/tektoncd/pipeline1.0.2, 1.11.1, 1.3.4, 1.6.2, 1.9.3GO-2026-5272

Affected products (as reported)

VendorProductVersions
tektoncd pipeline >= 1.0.0, < 1.0.2>= 1.2.0, < 1.3.4>= 1.4.0, < 1.6.2>= 1.7.0, < 1.9.3>= 1.10.0, < 1.11.1

Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References