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CVE-2026-25542— Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching

CVSS 6.5 · Medium EPSS 0.03% · P10
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I. Basic Information for CVE-2026-25542

Vulnerability Information
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Vulnerability Title
Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching
Source: NVD (National Vulnerability Database)
Vulnerability Description
Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. From 0.43.0 to 1.11.0, 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
不正确的正则表达式
Source: NVD (National Vulnerability Database)
Vulnerability Title
Tekton Pipelines 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tekton Pipelines是Tekton开源的一个云原生管道。 Tekton Pipelines 0.43.0版本至1.11.0版本存在安全漏洞，该漏洞源于正则表达式匹配不当，可能导致攻击者绕过受信任资源验证策略。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
tektoncdpipeline >= 0.43.0, <= 1.11.0 -

II. Public POCs for CVE-2026-25542

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III. Intelligence Information for CVE-2026-25542

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Same Patch Batch · tektoncd · 2026-04-21 · 5 CVEs total

CVE-2026-401617.7 HIGHTekton Pipelines: Git resolver API mode leaks system-configured API token to user-controll
CVE-2026-409387.5 HIGHTekton Pipelines: Git Resolver Unsanitized Revision Parameter Enables git Argument Injecti
CVE-2026-409246.5 MEDIUMTekton Pipelines: HTTP Resolver Unbounded Response Body Read Enables Denial of Service via
CVE-2026-409235.4 MEDIUMTekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekto

IV. Related Vulnerabilities

Same product: pipeline
Same vendor: tektoncd
Same weakness: CWE-185

V. Comments for CVE-2026-25542

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