CVE-2025-66219

What it is

willitmerge is a command line tool to check if pull requests are mergeable. In versions 0.2.1 and prior, there is a command Injection vulnerability in willitmerge. The vulnerability manifests in this package due to the use of insecure child process execution API (exec) to which it concatenates user input, whether provided to the command-line flag, or is in user control in the target repository. At time of publication, no known fix is public.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.7% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-11-29 02:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-07 20:10 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.7% in the next 30 days (EPSS).
• Severity: 6.9 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2025-11-29 02:15 UTC

Last modified

2026-10-07 20:10 UTC

Exploit probability

2.7% · EPSS, next 30 days

Weakness

CWE-77 · Command injection

Record status

Analyzed

Affected

• Dontkry Willitmerge ≤ 0.2.1

Attack profile CVSS 4.0 · 6.9

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

None

Integrity

Low

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-66219.md and follow it. Check whether this project is affected by CVE-2025-66219. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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