{"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"}}]}}

{"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": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-25542", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-21T16:48:04.873157Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-21T16:48:11.309Z"}}]}}

{"cveTags": [], "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."}], "id": "CVE-2026-25542", "lastModified": "2026-04-21T17:16:24.213", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-21T17:16:24.213", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/tektoncd/pipeline/commit/b8905600322aa86327baae0a7c04d6cf1207362a"}, {"source": "security-advisories@github.com", "url": "https://github.com/tektoncd/pipeline/security/advisories/GHSA-rmx9-2pp3-xhcr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-185"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.43.0,1.11.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "pipeline", "source": "cna", "vendor": "tektoncd"}, "product": "pipeline", "vendor": "tektoncd"}], "created": "2026-04-21T17:30:37.395010+00:00", "updated": "2026-04-21T17:30:37.395045+00:00", "vendors": ["tektoncd", "tektoncd$PRODUCT$pipeline"]}