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[ CVE-2026-61570 · Published 22 Sep 2026 ]

MPXJ: XXE Vulnerability in MerlinReader

CVSS 7.5 EPSS <1%Fix available

[ Description ]Official description

MPXJ is an open source library to read and write project plans from a variety of file formats and databases. From 5.5.5 until 16.4.1, MerlinReader creates a DocumentBuilder with default settings while parsing XML from the ZTIMEINTERVALS column of a Merlin project SQLite database, leaving doctype declarations and external entities enabled. A crafted database can cause the parser to read an arbitrary local file, although MPXJ's subsequent handling of the parsed XML makes disclosure of the file contents unlikely. This issue is fixed in version 16.4.1.

[ Fixes ]Fixes and patches

  • net.sf.mpxj:mpxj 16.4.1Fixed version · GitHub Advisories · maven package net.sf.mpxj:mpxj: upgrade to 16.4.1 or later (affected >= 5.5.5, < 16.4.1)
  • mpxj 16.4.1Fixed version · GitHub Advisories · rubygems package mpxj: upgrade to 16.4.1 or later (affected >= 5.5.5, < 16.4.1)
  • MPXJ.Net 16.4.1Fixed version · GitHub Advisories · nuget package MPXJ.Net: upgrade to 16.4.1 or later (affected >= 5.5.5, < 16.4.1)
  • net.sf.mpxj 16.4.1Fixed version · GitHub Advisories · nuget package net.sf.mpxj: upgrade to 16.4.1 or later (affected >= 5.5.5, < 16.4.1)
  • net.sf.mpxj-for-csharp 16.4.1Fixed version · GitHub Advisories · nuget package net.sf.mpxj-for-csharp: upgrade to 16.4.1 or later (affected >= 5.5.5, < 16.4.1)
  • net.sf.mpxj-for-vb 16.4.1Fixed version · GitHub Advisories · nuget package net.sf.mpxj-for-vb: upgrade to 16.4.1 or later (affected >= 5.5.5, < 16.4.1)

[ Packages ]Affected open-source packages

[ References ]References