{"id":"CVE-2026-50630","state":"PUBLISHED","title":"Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection","description":"A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. When constructing the WWW-Authenticate response header, the 'realm' parameter is concatenated without sanitizing Carriage Return (CR) and Line Feed (LF) characters. If an attacker can control the realm value, they can inject arbitrary HTTP headers or split the HTTP response entirely. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.","publishedAt":"2026-06-12T08:58:27.181Z","updatedAt":"2026-08-07T12:43:16.673Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","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":"4.2.0","status":"affected","lessThan":"4.2.2","versionType":"semver"},{"version":"4.0.0","status":"affected","lessThan":"4.1.7","versionType":"semver"},{"version":"0","status":"affected","lessThan":"3.6.12","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":["https://lists.apache.org/thread/bt7vnjzzkpd6vdhkxv103poor1jy5trm","http://www.openwall.com/lists/oss-security/2026/06/11/7"],"weaknesses":["CWE-113"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50630.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50630","state":"PUBLISHED","datePublished":"2026-06-12T08:58:27.181Z","dateUpdated":"2026-08-07T12:43:16.673Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-06-05T10:57:56.617Z"},"containers":{"cna":{"title":"Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection","descriptions":[{"lang":"en","value":"A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. When constructing the WWW-Authenticate response header, the 'realm' parameter is concatenated without sanitizing Carriage Return (CR) and Line Feed (LF) characters. If an attacker can control the realm value, they can inject arbitrary HTTP headers or split the HTTP response entirely. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache CXF","packageName":"org.apache.cxf:cxf-rt-rs-security-oauth2","defaultStatus":"unaffected","versions":[{"version":"4.2.0","status":"affected","lessThan":"4.2.2","versionType":"semver"},{"version":"4.0.0","status":"affected","lessThan":"4.1.7","versionType":"semver"},{"version":"0","status":"affected","lessThan":"3.6.12","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":[{"url":"https://lists.apache.org/thread/bt7vnjzzkpd6vdhkxv103poor1jy5trm","tags":["vendor-advisory"]}],"metrics":[{"other":{"content":{"text":"low"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-113","description":"CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-08-07T12:43:16.673Z"},"credits":[{"lang":"en","type":"finder","value":"Guanping Zhang reported this vulnerability."}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/06/11/7"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-12T09:28:07.644Z"}},{"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:N/UI:N/S:U/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T14:03:00.752535Z","id":"CVE-2026-50630","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":"2026-06-12T14:03:22.085Z"}}]}}}