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.
Published: 2026-10-21
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 28 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 21 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Jelmer
Jelmer dulwich
Vendors & Products Jelmer
Jelmer dulwich

Wed, 21 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
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.
Title Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths
First Time appeared Dulwich Project
Dulwich Project dulwich
Weaknesses CWE-22
CPEs cpe:2.3:a:dulwich_project:dulwich:*:*:*:*:*:*:*:*
Vendors & Products Dulwich Project
Dulwich Project dulwich
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}


Subscriptions

Dulwich Project Dulwich
Jelmer Dulwich
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-28T15:57:01.832Z

Reserved: 2026-10-20T21:46:55.741Z

Link: CVE-2026-114094

cve-icon Vulnrichment

Updated: 2026-10-28T15:56:51.092Z

cve-icon NVD

Status : Deferred

Published: 2026-10-21T01:17:34.580

Modified: 2026-10-28T16:17:06.070

Link: CVE-2026-114094

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-21T00:36:58Z

Links: CVE-2026-114094 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T21:45:06Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')