CVE-2026-114094
Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 21, 2026
- Updated
- Oct 28, 2026
- Reserved
- Oct 20, 2026
Description
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 and writes files outside the worktree to achieve remote code execution.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
dulwichjelmer |
|
References
- GitHub Security Advisory (GHSA-8mcx-5rqc-vhmf)vendor-advisory
- VulnCheck Advisory: Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter pathsthird-party-advisory
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