CVE-2026-16999 XXE in Ministry of Justice's UYAP Document Editor
An attacker can exploit XML external entity references in the UYAP Document Editor to read sensitive data or execute code.
- 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-2026-16999?
CVE-2026-16999 is a medium-severity vulnerability in Ministry of Justice UYAP Document Editor, published on 12 Aug 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 restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking.
This issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.
Weakness: CWE-611
Which versions are affected by CVE-2026-16999?
How do I fix CVE-2026-16999?
No fix has been published for CVE-2026-16999 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16999 being exploited?
There is no known exploitation of CVE-2026-16999 in the wild and no public exploit code.
Sources
Also known as GHSA-vw7v-jmvx-4grc.