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CVE-2026-52726— Dulwich's submodule path traversal in porcelain.submodule_update / porcelain.clone(recurse_submodules=True) yields RCE via attacker-dropped .git/hooks payload

CVSS 7.5 · High EPSS 0.45% · P36

Affected Version Matrix 1

VendorProductVersion RangeStatus
jelmerdulwich>= 0.23.2, < 1.2.5affected
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I. Basic Information for CVE-2026-52726

Vulnerability Information
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Vulnerability Title
Dulwich's submodule path traversal in porcelain.submodule_update / porcelain.clone(recurse_submodules=True) yields RCE via attacker-dropped .git/hooks payload
Source: NVD (National Vulnerability Database)
Vulnerability Description
Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.23.2 and prior to version 1.2.5, `dulwich.porcelain.submodule_update`, and by extension `porcelain.clone(..., recurse_submodules=True)`, materializes attacker-controlled submodule paths from a crafted upstream repository without path validation. A malicious `.gitmodules` plus a matching tree gitlink whose `path` is `.git/hooks` (or any other directory inside the parent repository's `.git` directory) causes the attacker's submodule tree contents to be written directly into the victim's `.git/hooks/` directory, preserving executable mode bits. The dropped executables are then run by any subsequent `git` or `dulwich` command that invokes the matching hook, resulting in arbitrary code execution. This is the dulwich equivalent of the upstream Git fixes for CVE-2024-32002 / CVE-2024-32004, which were never propagated into dulwich's separately implemented submodule porcelain. Version 1.2.5 patches the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Dulwich 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dulwich是Jelmer Vernooij个人开发者的一款纯Python实现的Git仓库操作接口。 Dulwich 0.23.2版本至1.2.5之前版本存在路径遍历漏洞，该漏洞源于porcelain.submodule_update方法未验证子模块路径，导致恶意.gitmodules可将子模块内容写入.git/hooks目录，从而执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
jelmerdulwich >= 0.23.2, < 1.2.5 -

II. Public POCs for CVE-2026-52726

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9758 chars
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III. Intelligence Information for CVE-2026-52726

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Vendor Advisories for CVE-2026-52726 (1)

Vendor Pages for CVE-2026-52726 (1)

Same Patch Batch · jelmer · 2026-06-10 · 5 CVEs total

CVE-2026-423058.8 HIGHDulwich has an arbitrary file write via NTFS-hostile tree entries on Windows
CVE-2026-477345.7 MEDIUMDulwich has unbounded memory allocation in receive-pack from crafted thin packs
CVE-2026-477123.3 LOWDulwich doesn't sanitize commit subjects in `porcelain.format_patch`
CVE-2026-42563Dulwich Vulnerable to Command Injection via Merge Driver Path

IV. Related Vulnerabilities

Same product: dulwich
Same vendor: jelmer
Same weakness: CWE-22

V. Comments for CVE-2026-52726

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