Path Traversal in Jelmer Dulwich
CVE-2026-114094
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/jelmer/dulwich/security/advisories/GHSA-8mcx-5rqc-vhmf (vendor-advisory)
- www.vulncheck.com/advisories/dulwich-before-1.2.9-arbitrary-file-write-via-dos-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114094?
- CVE-2026-114094 is a high-severity vulnerability in Jelmer Dulwich, classified under Path Traversal. CVSS score: 8.8/10. Published 2026-10-21.
- How severe is CVE-2026-114094?
- High severity. CVSS v3 base score is 8.8 out of 10.