RCE in Dontkry Willitmerge
CVE-2025-66219
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.027 (84.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Dontkry Willitmerge
- Shama Willitmerge — versions <= 0.2.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-66219?
- CVE-2025-66219 is a critical-severity vulnerability in Dontkry Willitmerge, classified under Command Injection. CVSS score: 9.8/10. Published 2025-11-29.
- How severe is CVE-2025-66219?
- Critical severity. CVSS v3 base score is 9.8 out of 10.