PT-2026-48568 · Jelmer · Dulwich

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-52726

Mitre

CVSS v3.1

7.5

High

Base vector

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

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.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-52726

Affected Products

Dulwich

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-52726 · Security Note
• https://github.com/jelmer/dulwich/security/advisories/GHSA-gfhv-vqv2-4544 · Note
• https://github.com/jelmer/dulwich/releases/tag/dulwich-1.2.5 · Note