PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-16999 Ministry of Justice CVE debrief

The Ministry of Justice UYAP Document Editor is vulnerable to an improper restriction of XML external entity reference, allowing Serialized Data External Linking. This issue affects versions from 4.5.17 before 5.4.17. The vulnerability has a CVSS score of 6.3 and a severity of MEDIUM. Administrators and users of UYAP Document Editor versions 4.5.17 to 5.4.17 should review and apply patches or updates to mitigate potential risks. The CVE record was published on 2026-08-12T14:17:47.890Z and has not been modified since then.

Vendor
Ministry of Justice
Product
UYAP Document Editor
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-12
Original CVE updated
2026-08-26
Advisory published
2026-08-12
Advisory updated
2026-08-26

Who should care

Administrators and users of UYAP Document Editor versions 4.5.17 to 5.4.17 should review and apply patches or updates to mitigate potential risks. The vulnerability has a medium-priority defensive review recommended due to potential for localized impact. Users of UYAP Document Editor should also implement compensating controls such as input validation and XML parsing restrictions, and monitor for suspicious activity and exception tracking.

Technical summary

The Ministry of Justice UYAP Document Editor is vulnerable to an improper restriction of XML external entity reference, allowing Serialized Data External Linking. This issue affects versions from 4.5.17 before 5.4.17. The vulnerability has a CVSS score of 6.3 and a severity of MEDIUM. The affected product is UYAP Document Editor, and the vulnerability has a medium-priority defensive review recommended due to potential for localized impact.

Defensive priority

Medium-priority defensive review recommended due to potential for localized impact.

Recommended defensive actions

  • Review and apply vendor-provided patches or updates for UYAP Document Editor.
  • Implement compensating controls such as input validation and XML parsing restrictions.
  • Monitor for suspicious activity and exception tracking.

Evidence notes

Evidence from official CVE and NVD sources indicates an improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor, allowing Serialized Data External Linking. Affected versions are from 4.5.17 before 5.4.17.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-16999 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-16999

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-16999 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-16999

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.