{"id":"CVE-2026-40082","aliases":["DEBIAN-CVE-2026-40082","EUVD-2026-39586","GHSA-273r-qr93-wgcp","UBUNTU-CVE-2026-40082"],"status":"published","title":"Cacti: Session Fixation via missing session_regenerate_id() after login","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0032,"percentile":0.25299,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-384"],"published":"2026-06-25T22:33:45Z","modified":"2026-10-28T02:31:01Z","fixes":[{"ecosystem":"Debian:14","package":"cacti","fixed_in":["1.2.31+ds1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.24+ds1-1","1.2.24+ds1-1+deb12u1","1.2.24+ds1-1+deb12u2","1.2.24+ds1-1+deb12u3","1.2.24+ds1-1+deb12u4","1.2.24+ds1-1+deb12u5","1.2.25+ds1-1","1.2.25+ds1-2","1.2.26+ds1-1","1.2.27+ds1-1","1.2.27+ds1-2","1.2.28+ds1-1","1.2.28+ds1-2","1.2.28+ds1-3","1.2.28+ds1-4","1.2.30+ds1-1","1.2.30+ds1-2","1.2.30+ds1-3","1.2.31+ds1-1","1.2.31+ds1-2","1.2.31+ds1-3","1.2.31+ds1-4"]},{"source":"osv","ecosystem":"Debian:13","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.30+ds1-1","1.2.30+ds1-2","1.2.30+ds1-3","1.2.31+ds1-1","1.2.31+ds1-2","1.2.31+ds1-3","1.2.31+ds1-4"]},{"source":"osv","ecosystem":"Debian:14","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.31+ds1-1"}]}],"versions":["1.2.30+ds1-1","1.2.30+ds1-2","1.2.30+ds1-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.8b+dfsg-3","0.8.8b+dfsg-5","0.8.8b+dfsg-5ubuntu0.1","0.8.8b+dfsg-5ubuntu0.2","0.8.8b+dfsg-5ubuntu0.2+esm1","0.8.8b+dfsg-5ubuntu0.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.8f+ds1-2","0.8.8f+ds1-3","0.8.8f+ds1-4","0.8.8f+ds1-4ubuntu1","0.8.8f+ds1-4ubuntu2","0.8.8f+ds1-4ubuntu3","0.8.8f+ds1-4ubuntu4","0.8.8f+ds1-4ubuntu4.16.04","0.8.8f+ds1-4ubuntu4.16.04.1","0.8.8f+ds1-4ubuntu4.16.04.2","0.8.8f+ds1-4ubuntu4.16.04.2+esm1","0.8.8f+ds1-4ubuntu4.16.04.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.18+ds1-1","1.1.27+ds1-2","1.1.27+ds1-3","1.1.28+ds1-2","1.1.35+ds1-1","1.1.36+ds1-1","1.1.38+ds1-1","1.1.38+ds1-1ubuntu0.1~esm1","1.1.38+ds1-1ubuntu0.1~esm3","1.1.38+ds1-1ubuntu0.1~esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.4+ds1-2ubuntu3","1.2.9+ds1-1ubuntu1","1.2.9+ds1-1ubuntu2","1.2.10+ds1-1ubuntu1","1.2.10+ds1-1ubuntu1+esm1","1.2.10+ds1-1ubuntu1.1","1.2.10+ds1-1ubuntu1.1+esm1","1.2.10+ds1-1ubuntu1.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.16+ds1-2ubuntu1","1.2.19+ds1-2ubuntu1","1.2.19+ds1-2ubuntu1+esm1","1.2.19+ds1-2ubuntu1.1","1.2.19+ds1-2ubuntu1.1+esm1","1.2.19+ds1-2ubuntu1.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.25+ds1-2","1.2.26+ds1-1","1.2.26+ds1-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.28+ds1-4ubuntu1","1.2.30+ds1-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.30+ds1-1ubuntu2","1.2.30+ds1-1ubuntu3","1.2.31+ds1-3ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"cacti","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.30+ds1-1ubuntu1","1.2.30+ds1-1ubuntu2"]}],"products":[{"vendor":"cacti","product":"cacti"}],"references":[{"url":"https://github.com/Cacti/cacti/security/advisories/GHSA-273r-qr93-wgcp","tags":["x_refsource_CONFIRM","Exploit","Mitigation","Vendor Advisory","advisory","report"]},{"url":"https://github.com/Cacti/cacti/commit/2fa404e70a5702be10682555911228e8e51ba198","tags":["x_refsource_MISC","Patch","fix","report"]},{"url":"https://github.com/Cacti/cacti/releases/tag/release%2F1.2.31","tags":["x_refsource_MISC","Product","Release Notes","web","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40082.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40082","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-40082","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-40082","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-40082","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-40082","title":"Cacti: Session Fixation via missing session_regenerate_id() after login","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","status":"published","published":"2026-06-25T22:33:45.871Z","modified":"2026-06-26T18:42:09.149Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-39586","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","status":"published","published":"2026-06-25T22:33:45Z","modified":"2026-06-26T18:42:09Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:24.118614Z"}],"nvd":[{"id":"CVE-2026-40082","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","status":"published","published":"2026-06-25T23:17:02.76Z","modified":"2026-06-29T18:50:31.97Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:12:26.045561Z"}],"osv":[{"id":"CVE-2026-40082","title":"Cacti: Session Fixation via missing session_regenerate_id() after login","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","status":"published","published":"2026-06-25T22:33:45.871Z","modified":"2026-10-28T02:31:01.738160537Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T15:45:03.040464Z"},{"id":"DEBIAN-CVE-2026-40082","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","status":"published","published":"2026-06-25T23:17:02.76Z","modified":"2026-10-01T03:03:11.376540116Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:54.892385Z"},{"id":"UBUNTU-CVE-2026-40082","description":"Cacti is an open source performance and fault management framework. Versions 1.2.30 and prior have missing session_regenerate_id() after login, leading to Session Fixation. session_regenerate_id() is NOT called after successful login. The login flow at auth_login.php:203-207 directly sets $_SESSION[SESS_USER_ID] without rotating the session ID. The session cookie configuration is otherwise good (httponly=true, samesite=Strict, secure=true for HTTPS at include/global.php:513-537), but these do not prevent session fixation via same-site vectors. This issue has been fixed in version 1.2.31.","status":"published","published":"2026-06-25T23:17:00Z","modified":"2026-10-17T13:00:03.730899074Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:56:16.686388Z"}]}}