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Fencer Vulns
high 7.5

CVE-2026-61570 json

MPXJ: XXE Vulnerability in MerlinReader

published 2026-09-22 47 d ago modified 2026-10-01 38 d ago also GHSA-5vvx-3h34-f3gj , PYSEC-2026-4107 , EUVD-2026-84820

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven net.sf.mpxj:mpxj 16.4.1
  • rubygems mpxj 16.4.1
  • nuget MPXJ.Net 16.4.1
  • nuget net.sf.mpxj 16.4.1
  • nuget net.sf.mpxj-for-csharp 16.4.1
  • nuget net.sf.mpxj-for-vb 16.4.1
  • pypi mpxj 16.4.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-61570 updated cvss 5.3

net.sf.mpxj/mpxj: MPXJ: Information disclosure via XML External Entity (XXE) vulnerability in MerlinReader.

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
45 d ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven net.sf.mpxj:mpxj
>=5.5.5, <16.4.1
16.4.1
rubygems mpxj
>=5.5.5, <16.4.1
16.4.1
nuget MPXJ.Net
>=5.5.5, <16.4.1
16.4.1
nuget net.sf.mpxj
>=5.5.5, <16.4.1
16.4.1
nuget net.sf.mpxj-for-csharp
>=5.5.5, <16.4.1
16.4.1
nuget net.sf.mpxj-for-vb
>=5.5.5, <16.4.1
16.4.1
pypi mpxj
>=5.5.5, <16.4.1
16.4.1

Affected products

  • joniles mpxj

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.