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GHSA-5vvx-3h34-f3gj

HighCVSS 7.5 / 10
Published Sep 22, 2026·Last modified Sep 22, 2026
Affected Components(7)
PyPI logompxj
5.5.5 – 16.4.1
NuGet logonet.sf.mpxj-for-csharp
5.5.5 – 16.4.1
NuGet logonet.sf.mpxj
5.5.5 – 16.4.1
1 / 3
Description

Impact

MPXJ used the default configuration when creating a DocumentBuilder instance, which leaves doctype declarations enabled, when parsing the XML content of the ZTIMEINTERVALS column from a Merlin project SQLite file. This would allow a carefully crafted XML payload to read an arbitrary file. However, although an arbitrary file can be read, the way the resulting parsed XML is processed by MPXJ means that the data it contains is unlikely to be available for exfiltration.

Patches

The patch is included in MPXJ 16.4.1

Workarounds

Potential workarounds include:

  • Avoid reading Merlin project files with MPXJ
  • Only accept Merlin project files from trusted sources
  • Preprocess Merlin SQLite databases to strip doctype declarations from the ZTIMEINTERVALS column
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Risk Scores
Base Score
7.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.

Threat Intelligence
6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2026-61570
    Alias
  • EUVD-2026-84820
    Alias

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High severity
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