OS Command Injection Affecting python-dulwich package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.56% (47th percentile)

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  • Snyk IDSNYK-RHEL7-PYTHONDULWICH-19702763
  • published12 Sept 2026
  • disclosed10 Jun 2026

Introduced: 10 Jun 2026

CVE-2026-42563  (opens in a new tab)
CWE-78  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 python-dulwich.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-dulwich package and not the python-dulwich package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1