{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42521", "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "state": "PUBLISHED", "assignerShortName": "jenkins", "dateReserved": "2026-04-28T09:24:35.048Z", "datePublished": "2026-04-29T13:31:30.608Z", "dateUpdated": "2026-04-29T13:58:20.768Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "shortName": "jenkins", "dateUpdated": "2026-04-29T13:31:30.608Z"}, "affected": [{"vendor": "Jenkins Project", "product": "Jenkins Matrix Authorization Strategy Plugin", "versions": [{"version": "2.0-beta-1", "versionType": "maven", "lessThanOrEqual": "3.2.9", "status": "affected"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes specified in configuration when deserializing inheritance strategies, without restricting the classes that can be instantiated, allowing attackers with Item/Configure permission to instantiate arbitrary types, which may lead to information disclosure or other impacts depending on the classes available on the classpath."}], "references": [{"name": "Jenkins Security Advisory 2026-04-29", "url": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676", "tags": ["vendor-advisory"]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-502", "lang": "en", "description": "CWE-502 Deserialization of Untrusted Data"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-29T13:58:15.842577Z", "id": "CVE-2026-42521", "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": "2026-04-29T13:58:20.768Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-42521", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-29T13:58:15.842577Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-502", "description": "CWE-502 Deserialization of Untrusted Data"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-29T13:58:09.444Z"}}], "cna": {"affected": [{"vendor": "Jenkins Project", "product": "Jenkins Matrix Authorization Strategy Plugin", "versions": [{"status": "affected", "version": "2.0-beta-1", "versionType": "maven", "lessThanOrEqual": "3.2.9"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676", "name": "Jenkins Security Advisory 2026-04-29", "tags": ["vendor-advisory"]}], "descriptions": [{"lang": "en", "value": "Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes specified in configuration when deserializing inheritance strategies, without restricting the classes that can be instantiated, allowing attackers with Item/Configure permission to instantiate arbitrary types, which may lead to information disclosure or other impacts depending on the classes available on the classpath."}], "providerMetadata": {"orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "shortName": "jenkins", "dateUpdated": "2026-04-29T13:31:30.608Z"}}}, "cveMetadata": {"cveId": "CVE-2026-42521", "state": "PUBLISHED", "dateUpdated": "2026-04-29T13:58:20.768Z", "dateReserved": "2026-04-28T09:24:35.048Z", "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "datePublished": "2026-04-29T13:31:30.608Z", "assignerShortName": "jenkins"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*", "matchCriteriaId": "E3A25BA3-0771-4973-A265-27CCD8973FD5", "versionEndExcluding": "3.2.10", "versionStartIncluding": "2.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta1:*:*:*:jenkins:*:*", "matchCriteriaId": "5BE52D85-98B6-42EF-8817-A0039B61406A", "vulnerable": true}, {"criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta2:*:*:*:jenkins:*:*", "matchCriteriaId": "55E2BB1C-F686-46E0-8D12-A0C70DF2CC91", "vulnerable": true}, {"criteria": "cpe:2.3:a:jenkins:matrix_authorization_strategy:2.0:beta3:*:*:*:jenkins:*:*", "matchCriteriaId": "B5E7F6EB-50E0-4A3B-A481-45BD14714558", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes specified in configuration when deserializing inheritance strategies, without restricting the classes that can be instantiated, allowing attackers with Item/Configure permission to instantiate arbitrary types, which may lead to information disclosure or other impacts depending on the classes available on the classpath."}], "id": "CVE-2026-42521", "lastModified": "2026-05-06T16:21:01.660", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-04-29T14:16:19.170", "references": [{"source": "jenkinsci-cert@googlegroups.com", "tags": ["Vendor Advisory"], "url": "https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3676"}], "sourceIdentifier": "jenkinsci-cert@googlegroups.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[2.0-beta-1,3.2.9]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Jenkins Matrix Authorization Strategy Plugin", "source": "cna", "vendor": "Jenkins Project"}, "product": "jenkins_matrix_authorization_strategy_plugin", "vendor": "jenkins_project"}], "created": "2026-04-29T17:00:13.520271+00:00", "updated": "2026-04-30T08:21:22.489784+00:00", "vendors": ["jenkins_project", "jenkins_project$PRODUCT$jenkins_matrix_authorization_strategy_plugin"]}