CVE-2026-18390 Command Injection in Ministry of Justice's UYAP Document Editor
Attackers can execute arbitrary OS commands via the UYAP Document Editor, requiring users to upgrade to secure versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-18390?
CVE-2026-18390 is a high-severity command injection vulnerability in Ministry of Justice General Directorate of Information Technology UYAP Document Editor, published on 12 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP Document Editor on Windows and Linux and Ministry of Justice General Directorate of Information Technology UYAP Document Editor on iOS allows OS Command Injection.
This issue affects UYAP Document Editor: before 5.4.20; UYAP Document Editor: before 5.4.21.
Weakness: CWE-78
Which versions are affected by CVE-2026-18390?
How do I fix CVE-2026-18390?
No fix has been published for CVE-2026-18390 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-18390 being exploited?
There is no known exploitation of CVE-2026-18390 in the wild and no public exploit code.
Sources
Also known as GHSA-mwwg-r5rc-h3pj.