Command Injection Affecting dulwich package, versions [0.24.0,1.2.5)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-DULWICH-17054926
- published29 May 2026
- disclosed28 May 2026
- creditRavishanker Kusuma
Introduced: 28 May 2026
CVE-2026-42563 (opens in a new tab)How to fix?
Upgrade dulwich to version 1.2.5 or higher.
Overview
Affected versions of this package are vulnerable to Command Injection via the ProcessMergeDriver command. An attacker can execute arbitrary commands by crafting malicious file paths that are substituted into the merge driver command and executed with shell privileges when a victim merges an untrusted branch. This is only exploitable if the user has a merge driver configured that uses the %P placeholder.