Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

不正确的正则表达式

Tekton Pipelines 安全漏洞

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。

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