{"id":"CVE-2026-112300","title":"DiffSK configobj __init__.py _sectionmarker redos","summary":"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 …","severity":"medium","cvss":5.3,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-1333","CWE-400"],"vendor":"DiffSK","product":"configobj","affected":["configobj 5.0.0","configobj 5.0.1","configobj 5.0.2","configobj 5.0.3","configobj 5.0.4","configobj 5.0.5","configobj 5.0.6","configobj 5.0.7","configobj 5.0.8","configobj 5.0.9"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T20:30:18.020Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112300","references":[{"url":"https://vuldb.com/vuln/422346","label":"VDB-422346 | DiffSK configobj __init__.py _sectionmarker redos"},{"url":"https://vuldb.com/vuln/422346/cti","label":"VDB-422346 | CTI Indicators (IOB, IOC, TTP, IOA)"},{"url":"https://vuldb.com/cve/CVE-2026-112300","label":"CVE-2026-112300 | CVE Analysis and Report"},{"url":"https://vuldb.com/submit/989395","label":"Submit #989395 | DiffSK configobj 5.0.9 Denial of Service"},{"url":"https://github.com/DiffSK/configobj/issues/281"},{"url":"https://github.com/DiffSK/configobj/"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T21:43:56.164Z","slug":"CVE-2026-112300","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `configobj 5.0.0`\n- `configobj 5.0.1`\n- `configobj 5.0.2`\n- `configobj 5.0.3`\n- `configobj 5.0.4`\n- `configobj 5.0.5`\n- `configobj 5.0.6`\n- `configobj 5.0.7`\n- `configobj 5.0.8`\n- `configobj 5.0.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}