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CVE-2026-114094— Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths

Quick assessment

Affected

jelmer dulwich

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dulwich 1.2.9 之前的版本在 Windows 平台上未能对 Git 树路径元素中的 DOS 驱动器盘符前缀进行验证，导致可被利用进行任意文件写入。攻击者可构造一个包含名为"C:"的树条目的恶意仓库，从而绕过 NTFS 验证机制，将文件写入工作树之外，最终实现远程代码执行。

CVSS 8.8 · High Updated Oct 21, 2026

Possible ATT&CK Techniques 2 AI

T1566 · Phishing T1203 · Exploitation for Client Execution

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Vulnerability Information

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Vulnerability Title

Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
jelmer	dulwich	0 ~ 1.2.9	-

II. Public POCs for CVE-2026-114094

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-114094

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Other References for CVE-2026-114094 (2)

https://github.com/jelmer/dulwich/security/advisories/GHSA-8mcx-5rqc-vhmf vendor-advisory
https://www.vulncheck.com/advisories/dulwich-before-1.2.9-arbitrary-file-write-via-dos-drive-letter-paths third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-114094

Same Patch Batch · jelmer · 2026-10-21 · 5 CVEs total

CVE-2026-114096	7.8 HIGH	Dulwich 0.24.0 before 1.2.8 Symlink Write-Through via porcelain.checkout paths
CVE-2026-114097	7.8 HIGH	Dulwich 0.23.1 before 1.2.8 Symlink Path Traversal via filter_branch Index Filter
CVE-2026-114098	7.8 HIGH	Dulwich 0.22.5 before 1.2.8 Path Traversal via Stash Pop Symlinks
CVE-2026-114095	6.5 MEDIUM	Dulwich before 1.2.9 Infinite Loop DoS via Pack.resolve_object

IV. Related Vulnerabilities

Same product: dulwich

Same vendor: jelmer

Same weakness: CWE-22

V. Comments for CVE-2026-114094

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-114094— Dulwich before 1.2.9 Arbitrary File Write via DOS drive letter paths

Quick assessment

Possible ATT&CK Techniques 2 AI

I. Basic Information for CVE-2026-114094

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-114094

III. Intelligence Information for CVE-2026-114094

Other References for CVE-2026-114094 (2)

Same Patch Batch · jelmer · 2026-10-21 · 5 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-114094

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