CVE-2026-114094
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductDulwich
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- dulwich1.2.9 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dulwichPyPI | v < 1.2.9 | 1.2.9 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.