{"id":"CVE-2026-104733","summary":"User Impersonation/Authorization Bypass in XMPP Server ejabberd","details":"User Impersonation in ProcessOnes XMMP Server ejabberd \u003c= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.","modified":"2026-10-04T02:46:00.091177074Z","published":"2026-10-02T12:19:10.635Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104733.json","cna_assigner":"NCSC.ch"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104733.json"},{"type":"ADVISORY","url":"https://github.com/processone/ejabberd/releases#release-26.07"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104733"},{"type":"ADVISORY","url":"https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/"},{"type":"PACKAGE","url":"https://github.com/processone/ejabberd"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/processone/ejabberd","events":[{"introduced":"0"},{"last_affected":"c002da3bb81f4e87d338d11bf7f6d9bc92409234"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"26.04"}],"source":"AFFECTED_FIELD"}}],"versions":["26.04","26.03","26.02","26.01","25.10","25.08","25.07","25.04","25.03","24.12","24.10","24.07","24.06","24.02","23.10","23.04","23.01","22.10","22.05","21.12","21.07","21.04","21.01","20.12","20.07","20.04","20.03","20.02","20.01","19.09","19.08","19.05","19.02","18.12","18.09","18.06","18.04","18.03","18.01","17.12","17.11","17.09","17.08","17.07","17.06","17.06-beta","17.04","17.03","17.03-beta","17.01","16.12","16.09","16.08","16.06","16.04","16.03","16.02","16.01","15.09","15.07","15.06","15.04","15.03","15.02","14.12","14.07","14.05","13.12","13.10","13.09","13.06","v2.1.12","13.03-beta1","v2.1.11","v2.1.10","v2.1.9","v2.1.8","v2.1.7","v2.1.6","v2.1.5","v2.1.4","v2.1.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104733.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P"}]}