vulnerability · Fri 02 Oct 2026 · 19:14 UTC
GHSA-8mcx-5rqc-vhmf: Dulwich: Arbitrary File Write (RCE) on Windows via Unvalidated Drive Letters in Tree Paths
Filed UTCSource GTH ↗
Affected files * dulwich/index.py (Methods: validate_path_element_ntfs, _tree_to_fs_path) * dulwich/porcelain/__init__.py (Method: _checked_worktree_path) ### Description / Summary A High-severity Path Traversal vulnerability exists in Dulwich's checkout logic when running on Windows. The functions responsible for validating NTFS paths strictly reject .git variants, Alternate Data Streams (ADS), git~1 short names, and reserved device names, but they completely fail to check for DOS drive letter prefixes. A malicious Git tree can contain an entry named C:. …
Signals
as the pipeline stamped them- High
- High-risk vulnerability — CVSS 8.8
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