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Medium severity6.5NVD Advisory· Published Apr 21, 2026· Updated May 22, 2026

CVE-2026-25542

CVE-2026-25542

Description

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 (including examples in tekton documentation) can be bypassed by attacker-controlled source strings that contain the trusted pattern as a substring. This can cause an unintended policy match and change which verification mode/keys apply. Versions 1.0.2, 1.3.4, 1.6.2, 1.9.3, and 1.11.1 fix the issue.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/tektoncd/pipelineGo
>= 0.43.0, < 1.0.21.0.2
github.com/tektoncd/pipelineGo
>= 1.2.0, < 1.3.41.3.4
github.com/tektoncd/pipelineGo
>= 1.4.0, < 1.6.21.6.2
github.com/tektoncd/pipelineGo
>= 1.7.0, < 1.9.31.9.3
github.com/tektoncd/pipelineGo
>= 1.10.0, < 1.11.11.11.1

Affected products

125

Patches

Vulnerability mechanics

References

6

News mentions

0

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