{"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"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-28T15:53:36.932851Z"},"exploitAvailable":true,"published":"2026-10-21","updated":"2026-10-28","sourceUpdated":"2026-10-28T15:57:01.832Z","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"},{"url":"https://github.com/jelmer/dulwich/commit/4ca77f9f470742ba246cd6fa07beb6d735045664"},{"url":"https://github.com/jelmer/dulwich"},{"url":"https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.9"}],"tags":["cve.org","exploit-available","osv","pip"],"epss":0.00671,"epssPercentile":0.51887,"aliases":["GHSA-8mcx-5rqc-vhmf"],"ecosystem":"pip","patched":["dulwich 1.2.9"],"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.\n\n## Package advisory (CVE-2026-114094)\n\nAffected packages:\n\n- `dulwich < 1.2.9`\n\nPatched in:\n\n- `dulwich 1.2.9`\n\nSource: https://osv.dev/vulnerability/GHSA-8mcx-5rqc-vhmf","depth":"midnight","depthScore":61,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":230700,"id":"CVE-2026-114094","ts":1793204065461,"field":"exploit_available","old":"false","new":"true"}]}