{"id":"CVE-2026-50623","title":"An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed…","summary":"An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-287"],"vendor":"apache","product":"cxf","affected":["cxf < 4.1.7","cxf >= 4.2.0, < 4.2.2"],"patched":["cxf 4.2.2"],"published":"2026-06-12","updated":"2026-08-07","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50623","references":[{"url":"https://lists.apache.org/thread/ydzj8m5mqmjy13xgyj9mkk9hfff63qq7","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/06/11/3","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00357,"epssPercentile":0.29492,"ingestedAt":"2026-08-07T14:14:17.189Z","slug":"CVE-2026-50623","body":"## Overview\n\nAn authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that this is a safeguard only in the case that someone forgot to enable authentication on the service. Users are recommended to upgrade to version 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.\n\n## Affected\n\n- `cxf < 4.1.7`\n- `cxf >= 4.2.0, < 4.2.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `cxf 4.2.2`","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}