{"identifier":"CVE-2026-50631","cve":{"id":"CVE-2026-50631","description":"A race condition in AbstractOAuthDataProvider allows concurrent requests using the same Refresh Token to bypass single-use semantics and generate multiple valid Access Tokens, when 'recycleRefreshTokens' is set to false. A leaked refresh token can be replayed concurrently by multiple attackers or threads. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.","published":"2026-06-12T10:16:23.070000+00:00","modified":"2026-10-26T11:10:00.157000+00:00","status":"Modified","score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cvss_version":"3.1","affected":[{"criteria":"cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*","versionStartIncluding":"","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"4.1.7"},{"criteria":"cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.0","versionStartExcluding":"","versionEndIncluding":"","versionEndExcluding":"4.2.2"}],"weaknesses":["CWE-367"],"references":[{"url":"https://lists.apache.org/thread/s83t3x4r626o9h8rt0ryr1w7w53l1vv8","source":"security@apache.org","tags":["Vendor Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/06/11/8","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":7.4,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-12T14:03:56.077000Z","id":"CVE-2026-50631","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*","versionEndExcluding":"4.1.7","matchCriteriaId":"C0505632-D713-4EFC-B857-12EBD5C3DF33"},{"vulnerable":true,"criteria":"cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.0","versionEndExcluding":"4.2.2","matchCriteriaId":"B1BF06FC-96AD-4663-9959-1B1493D4A2A0"}]}]}],"source":"nvd","retrieved_at":"2026-10-28T10:25:31.264794+00:00","exploited":false,"kev_stale":false,"products":["apache / cxf"],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00293,"percentile":0.21826,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"lists.apache.org","source_url":"https://lists.apache.org/thread/s83t3x4r626o9h8rt0ryr1w7w53l1vv8","investigate_url":"https://investigate.aeglixmind.com/#lists.apache.org"},{"domain":"www.openwall.com","source_url":"http://www.openwall.com/lists/oss-security/2026/06/11/8","investigate_url":"https://investigate.aeglixmind.com/#www.openwall.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-50631","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-50631","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-50631","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}