Arbitrary Argument Injection Affecting tkn-fips package, versions <0.44.1-r4


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.79% (52nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-TKNFIPS-16539740
  • published8 May 2026
  • disclosed21 Apr 2026

Introduced: 21 Apr 2026

CVE-2026-40938  (opens in a new tab)
CWE-88  (opens in a new tab)

How to fix?

Upgrade Chainguard tkn-fips to version 0.44.1-r4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tkn-fips package and not the tkn-fips package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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 Base Scores

version 3.1