{"id":"CVE-2026-39864","aliases":["DEBIAN-CVE-2026-39864","EUVD-2026-20617","GHSA-6m86-m342-g48m","UBUNTU-CVE-2026-39864"],"status":"published","title":"Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","severity":{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00313,"percentile":0.24444,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2026-04-08T19:58:08Z","modified":"2026-10-28T02:31:05Z","fixes":[{"ecosystem":"Debian:13","package":"kamailio","fixed_in":["6.0.1-1+deb13u2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"kamailio","fixed_in":["6.0.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.6.3-2","5.6.4-1","5.7.0-1","5.7.2-1","5.7.3-1","5.7.4-1","5.8.2-2","5.8.2-3","5.8.2-4","5.8.3-1","5.8.4-1","5.8.5-1","6.0.0-1","6.0.1-1","6.0.2-1","6.0.2-2","6.0.2-3","6.0.3-1","6.0.3-2","6.0.3-3","6.0.4-1","6.0.5-1","6.1.1-2","6.1.1-2.1","6.1.2-1","6.1.3-1","6.1.3-2","6.1.4-1"]},{"source":"osv","ecosystem":"Debian:13","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.1-1+deb13u2"}]}],"versions":["6.0.1-1","6.0.1-1+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.5-1"}]}],"versions":["6.0.1-1","6.0.2-1","6.0.2-2","6.0.2-3","6.0.3-1","6.0.3-2","6.0.3-3","6.0.4-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-2ubuntu1","4.3.4-1.1ubuntu1","4.3.4-1.1ubuntu2","4.3.4-1.1ubuntu2.1","4.3.4-1.1ubuntu2.1+esm1","4.3.4-1.1ubuntu2.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.2-3ubuntu5","5.0.4-1ubuntu1","5.1.1-1ubuntu1","5.1.1-1ubuntu4","5.1.2-1ubuntu1","5.1.2-1ubuntu2","5.1.2-1ubuntu2+esm1","5.1.2-1ubuntu2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.3-1build3","5.2.3-1build4","5.3.0-2","5.3.1-1","5.3.2-1build1","5.3.2-1build2","5.3.2-1build3","5.3.2-1ubuntu0.1~esm1","5.3.2-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.4.4-1build1","5.4.4-1ubuntu1","5.4.4-1ubuntu2","5.5.4-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.7.0-1build1","5.7.2-1build1","5.7.3-1","5.7.4-1","5.7.4-1build1","5.7.4-1build5","5.7.4-1build7"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"kamailio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.8.4-1build1","6.0.1-1build2","6.0.2-2"]}],"products":[{"vendor":"kamailio","product":"kamailio"}],"references":[{"url":"https://github.com/kamailio/kamailio/security/advisories/GHSA-6m86-m342-g48m","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39864.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39864","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-39864","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-39864","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-39864","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-39864","title":"Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","status":"published","published":"2026-04-08T19:58:08.565Z","modified":"2026-04-08T20:19:53.226Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:20:02.662847Z"}],"euvd":[{"id":"EUVD-2026-20617","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","status":"published","published":"2026-04-08T19:58:08Z","modified":"2026-04-08T20:19:53Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:24:31.230458Z"}],"nvd":[{"id":"CVE-2026-39864","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","status":"published","published":"2026-04-08T20:16:26.7Z","modified":"2026-07-24T21:10:00.143Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:13.902911Z"}],"osv":[{"id":"CVE-2026-39864","title":"Kamailio Auth: Processing Vulnerability For Additional Authenticated User Identity Checks","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","status":"published","published":"2026-04-08T19:58:08.565Z","modified":"2026-10-28T02:31:05.009282487Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:45:03.040464Z"},{"id":"DEBIAN-CVE-2026-39864","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","status":"published","published":"2026-04-08T20:16:26.7Z","modified":"2026-10-01T03:03:11.8676742Z","cvss":[{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-39864","description":"Kamailio is an open source implementation of a SIP Signaling Server. Prior to 6.0.5 and 5.8.7, an out-of-bounds read in the auth module of Kamailio (formerly OpenSER and SER) allows remote attackers to cause a denial of service (process crash) via a specially crafted SIP packet if a successful user authentication without a database backend is followed by additional user identity checks. This vulnerability is fixed in 6.0.5 and 5.8.7.","status":"published","published":"2026-04-08T20:16:00Z","modified":"2026-04-27T18:57:20.674264Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:16.686388Z"}]}}