Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-42563 Remote Code Execution in Dulwich via Malicious File Path Substitution https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42563
Post summary
A new CVE (CVE-2026-42563) has been announced, describing a Remote Code Execution vulnerability in Dulwich caused by malicious file path substitution. No PoC, exploit, or patch details are provided.