What is CVE-2026-16999?

CVE-2026-16999 is a medium-severity vulnerability in Ministry Of Justice Uyap Document Editor, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.3/10. Published 2026-08-12.

How severe is CVE-2026-16999?

Medium severity. CVSS v3 base score is 6.3 out of 10.

XXE in Ministry Of Justice Uyap Document Editor

CVE-2026-16999

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.

Vulnerability class: XXE (XML External Entity)

Published 2026-08-12 · last modified 2026-08-26.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.8th percentile), scored 2026-09-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000

Affected products

Ministry Of Justice Uyap Document Editor — versions 4.5.17

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0818 (government-resource)

Frequently asked questions

What is CVE-2026-16999?: CVE-2026-16999 is a medium-severity vulnerability in Ministry Of Justice Uyap Document Editor, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.3/10. Published 2026-08-12.
How severe is CVE-2026-16999?: Medium severity. CVSS v3 base score is 6.3 out of 10.