{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-25542","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-02-02T19:59:47.375Z","datePublished":"2026-04-21T16:05:43.217Z","dateUpdated":"2026-04-21T16:48:15.671Z"},"containers":{"cna":{"title":"Tekton Pipelines: VerificationPolicy regex pattern bypass via substring matching","problemTypes":[{"descriptions":[{"cweId":"CWE-185","lang":"en","description":"CWE-185: Incorrect Regular Expression","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr"},{"name":"https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a","tags":["x_refsource_MISC"],"url":"https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a"}],"affected":[{"vendor":"tektoncd","product":"pipeline","versions":[{"version":">= 0.43.0, <= 1.11.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-21T16:05:43.217Z"},"descriptions":[{"lang":"en","value":"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":{"advisory":"GHSA-rmx9-2pp3-xhcr","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-21T16:48:04.873157Z","id":"CVE-2026-25542","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-21T16:48:15.671Z"}}]}}