{"id":"CVE-2026-112300","aliases":["AZL-110064","BELL-CVE-2026-112300","DEBIAN-CVE-2026-112300","EUVD-2026-104597","GHSA-w53r-mv8r-wgxx","UBUNTU-CVE-2026-112300","openSUSE-SU-2026:12473-1"],"status":"published","title":"DiffSK configobj __init__.py _sectionmarker redos","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00534,"percentile":0.4552,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1333","CWE-400"],"published":"2026-10-19T20:30:18Z","modified":"2026-11-07T17:27:11Z","fixes":[{"ecosystem":"openSUSE:Tumbleweed","package":"python-configobj","fixed_in":["5.0.9-2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"python-configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.0.6-7"}]}]},{"source":"osv","ecosystem":"Alpaquita:23","package":"py3-configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.6-r10"}]}]},{"source":"osv","ecosystem":"Alpaquita:25","package":"py3-configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.9-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:stream","package":"py3-configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.6-r10"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.8-1","5.0.8-2","5.0.8-3","5.0.9-1"]},{"source":"osv","ecosystem":"Debian:13","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.9-1"]},{"source":"osv","ecosystem":"Debian:14","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.9-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.2+ds-5","4.7.2+ds-5build1","4.7.2+ds-5ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.6-2","5.0.6-2ubuntu0.16.04.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.6-2","5.0.6-2ubuntu0.18.04.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.6-3","5.0.6-3build1","5.0.6-4","5.0.6-4ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.6-4","5.0.6-5","5.0.6-5ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.8-2","5.0.8-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.9-1build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.9-1","5.0.9-1build1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"python-configobj","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.9-2.1"}]}]}],"products":[{"vendor":"diffsk","product":"configobj"}],"references":[{"url":"https://vuldb.com/vuln/422346","tags":["vdb-entry","technical-description","advisory"]},{"url":"https://vuldb.com/vuln/422346/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-112300","tags":["third-party-advisory","advisory"]},{"url":"https://vuldb.com/submit/989395","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/DiffSK/configobj/issues/281","tags":["issue-tracking","report"]},{"url":"https://github.com/DiffSK/configobj/","tags":["product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112300","tags":["web","advisory"]},{"url":"https://github.com/DiffSK/configobj"},{"url":"https://github.com/advisories/GHSA-w53r-mv8r-wgxx"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-112300","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112300.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-112300","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-112300","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-112300","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-112300","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-112300","title":"DiffSK configobj __init__.py _sectionmarker redos","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T20:30:18.02Z","modified":"2026-10-20T16:09:34.927Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:C","level":"medium","assessor":"cna"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:C","level":"medium","assessor":"cna"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:ND/RC:C","assessor":"cna"}],"cwes":["CWE-1333","CWE-400"],"updated_at":"2026-11-02T13:44:51.734189Z"}],"euvd":[{"id":"EUVD-2026-104597","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T20:30:18Z","modified":"2026-10-20T16:09:34Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","level":"medium"}],"updated_at":"2026-11-02T16:59:43.600473Z"}],"ghsa":[{"id":"GHSA-w53r-mv8r-wgxx","title":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is...","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T21:36:30Z","modified":"2026-10-19T21:36:39Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:14:01.813939Z"}],"nvd":[{"id":"CVE-2026-112300","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T21:17:06.677Z","modified":"2026-10-20T19:27:34.43Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-400","CWE-1333"],"updated_at":"2026-11-02T14:13:00.83844Z"}],"osv":[{"id":"BELL-CVE-2026-112300","status":"published","published":"2026-10-20T06:07:08.537189Z","modified":"2026-10-28T07:15:04.689144027Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:23.037038Z"},{"id":"CVE-2026-112300","title":"DiffSK configobj __init__.py _sectionmarker redos","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T20:30:18.02Z","modified":"2026-11-07T17:27:11.134462149Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","level":"medium"}],"cwes":["CWE-1333","CWE-400"],"updated_at":"2026-11-07T17:50:10.369679Z"},{"id":"DEBIAN-CVE-2026-112300","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T21:17:06.677Z","modified":"2026-10-25T22:00:06.675819307Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:49.824149Z"},{"id":"UBUNTU-CVE-2026-112300","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T21:17:00Z","modified":"2026-10-28T20:17:43.050576843Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.591851Z"},{"id":"AZL-110064","title":"CVE-2026-112300 affecting package python-configobj 5.0.6-7","description":"A vulnerability was identified in DiffSK configobj up to 5.0.9. Affected by this vulnerability is the function _sectionmarker of the file configobj/__init__.py. The manipulation leads to inefficient regular expression complexity. Remote exploitation of the attack is possible. The project was informed of the problem early through an issue report but has not responded yet.","status":"published","published":"2026-10-19T21:17:06Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:18.42484Z"},{"id":"openSUSE-SU-2026:12473-1","title":"python313-configobj-5.0.9-2.1 on GA media","description":"These are all security issues fixed in the python313-configobj-5.0.9-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-11-06T00:00:00Z","modified":"2026-11-07T17:23:16.135566428Z","updated_at":"2026-11-07T17:50:39.727056Z"}]}}