🛡️ CVE-2026-42563
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-78 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Dulwich is a pure-Python implementation of the Git file formats and protocols. Starting in version 0.24.0 and prior to version 1.2.5, Dulwich's `ProcessMergeDriver` substitutes the file path (from the git tree, controllable by an attacker via a malicious branch) into the merge driver command via the `%P` placeholder and executes it with `subprocess.run(..., shell=True)`. An attacker who can cause a victim to merge an untrusted branch can achieve arbitrary command execution by crafting malicious file paths. Version 1.2.5 fixes the issue.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE CWE-78
Public Exploit ✅ No
Source NVD
Published 2026-05-28
Updated 2026-06-12
Modified 2026-06-11
Fix URL N/A

Affected Packages

Software From version Fixed in
dulwich 0.24.0 1.2.5
unknown — —

Exploit Protection

Help block exploit attempts

BotEraser is designed to detect and help reduce malicious bot traffic that may target known vulnerabilities on your site.

Try BotEraser Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.