{"id":"CVE-2026-61466","state":"PUBLISHED","title":"Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation","description":"In Apache CXF's OAuth2 Dynamic Client Registration endpoint, the authorization server accepts and stores the `scope` value supplied in the client registration request verbatim, without validating it against an AS-defined allowlist. This could lead to a client self-assigning privileged scopes at registration time. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.","publishedAt":"2026-08-06T11:24:27.466Z","updatedAt":"2026-08-07T00:01:45.092Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache CXF"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache CXF","packageName":"org.apache.cxf:cxf-rt-rs-security-oauth2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.6.12","versionType":"semver"},{"version":"4.0.0","status":"affected","lessThan":"4.1.8","versionType":"semver"},{"version":"4.2.0","status":"affected","lessThan":"4.2.3","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":["https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs","http://www.openwall.com/lists/oss-security/2026/08/06/21"],"weaknesses":["CWE-304"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/61xxx/CVE-2026-61466.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61466","state":"PUBLISHED","datePublished":"2026-08-06T11:24:27.466Z","dateUpdated":"2026-08-07T00:01:45.092Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-07-09T14:46:58.308Z"},"containers":{"cna":{"title":"Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation","descriptions":[{"lang":"en","value":"In Apache CXF's OAuth2 Dynamic Client Registration endpoint, the authorization server accepts and stores the `scope` value supplied in the client registration request verbatim, without validating it against an AS-defined allowlist. This could lead to a client self-assigning privileged scopes at registration time. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache CXF","packageName":"org.apache.cxf:cxf-rt-rs-security-oauth2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.6.12","versionType":"semver"},{"version":"4.0.0","status":"affected","lessThan":"4.1.8","versionType":"semver"},{"version":"4.2.0","status":"affected","lessThan":"4.2.3","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":[{"url":"https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs","tags":["vendor-advisory"]}],"metrics":[{"other":{"content":{"text":"moderate"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-304","description":"CWE-304 Missing Critical Step in Authentication","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-08-06T11:24:27.466Z"},"credits":[{"lang":"en","type":"finder","value":"Guanping Zhang reported this vulnerability."}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.1,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-06T15:19:01.154800Z","id":"CVE-2026-61466","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-06T15:19:29.688Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/08/06/21"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-08-07T00:01:45.092Z"}}]}}}