---
id: CVE-2026-65829
title: >-
  MPXJ is an open source library to read and write project plans from a variety
  of file formats and databases
summary: >-
  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
  arbit…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-22
vendor: joniles
product: mpxj
affected:
  - 'mpxj >= 7.3.0, < 16.5.0'
patched:
  - MPXJ.Net 16.5.0
  - mpxj 16.5.0
  - mpxj 16.5.0
  - net.sf.mpxj 16.5.0
  - net.sf.mpxj-for-csharp 16.5.0
  - net.sf.mpxj-for-vb 16.5.0
  - 'net.sf.mpxj:mpxj 16.5.0'
published: '2026-09-22'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65829'
references:
  - url: >-
      https://github.com/joniles/mpxj/commit/4347315afab1ef5a2907978a754fbc5b0ff58e6f
    label: security-advisories@github.com
  - url: 'https://github.com/joniles/mpxj/releases/tag/v16.5.0'
    label: security-advisories@github.com
  - url: 'https://github.com/joniles/mpxj/security/advisories/GHSA-7952-gx68-cjqr'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-7952-gx68-cjqr'
  - url: 'https://github.com/joniles/mpxj'
tags:
  - nvd
  - cve.org
  - ghsa
  - nuget
  - osv
epss: 0.00429
epssPercentile: 0.36757
aliases:
  - GHSA-7952-gx68-cjqr
ecosystem: nuget
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-23T12:40:42.859556Z'
ingestedAt: '2026-09-22T20:10:15.094Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-65829)

Affected packages:

- `MPXJ.Net >= 7.3.0, < 16.5.0`
- `mpxj >= 7.3.0, < 16.5.0`
- `mpxj >= 7.3.0, < 16.5.0`
- `net.sf.mpxj >= 7.3.0, < 16.5.0`
- `net.sf.mpxj-for-csharp >= 7.3.0, < 16.5.0`
- `net.sf.mpxj-for-vb >= 7.3.0, < 16.5.0`
- `net.sf.mpxj:mpxj >= 7.3.0, < 16.5.0`

Patched in:

- `MPXJ.Net 16.5.0`
- `mpxj 16.5.0`
- `mpxj 16.5.0`
- `net.sf.mpxj 16.5.0`
- `net.sf.mpxj-for-csharp 16.5.0`
- `net.sf.mpxj-for-vb 16.5.0`
- `net.sf.mpxj:mpxj 16.5.0`

Source: https://github.com/advisories/GHSA-7952-gx68-cjqr