{"id":"CVE-2026-114094","title":"Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths","summary":"Dulwich before 1.2.9 fails to validate DOS drive letter prefixes in Git tree path elements on Windows, allowing arbitrary file write. Attackers can craft a malicious repository with a tree entry named 'C:' that bypasses NTFS validation a…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-22"],"vendor":"jelmer","product":"dulwich","affected":["dulwich < 1.2.9"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T00:36:58.401Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114094","references":[{"url":"https://github.com/jelmer/dulwich/security/advisories/GHSA-8mcx-5rqc-vhmf","label":"GitHub Security Advisory (GHSA-8mcx-5rqc-vhmf)"},{"url":"https://www.vulncheck.com/advisories/dulwich-before-1.2.9-arbitrary-file-write-via-dos-drive-letter-paths","label":"VulnCheck Advisory: Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T01:37:08.019Z","slug":"CVE-2026-114094","body":"## Overview\n\nDulwich before 1.2.9 fails to validate DOS drive letter prefixes in Git tree path elements on Windows, allowing arbitrary file write. Attackers can craft a malicious repository with a tree entry named 'C:' that bypasses NTFS validation and writes files outside the worktree to achieve remote code execution.\n\n## Affected\n\n- `dulwich < 1.2.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}