CVE-2026-65829

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 22, 2026

Last Modified

September 23, 2026

Advisory Details (3)

Auto-updated Sep 22, 2026
Patch available. Sources: github_release, github, github_commit.
github_release Patch Available

Version 16.5.0

Patch available: joniles/mpxj v16.5.0

https://github.com/joniles/mpxj/releases/tag/v16.5.0
github_commit Patch Available

commit 4347315afab1 (joniles/mpxj)

Patch available: joniles/mpxj v16.5.0 (contains commit 4347315afab1)

https://github.com/joniles/mpxj/commit/4347315afab1ef5a2907978a754fbc5b0ff58e6f
github Patch Available

Potential Path Traversal Vulnerability in Primavera P3 PRX and SureTrak STX readers · Advisory · joniles/mpxj · GitHub

https://github.com/joniles/mpxj/security/advisories/GHSA-7952-gx68-cjqr

Vendor Advisories for CVE-2026-65829(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(7 across 4 ecosystems)
NuGet(4)
PackageVulnerable rangeFixed inDependents
MPXJ.Net13.0.0 ... 16.4.1 (44 versions)16.5.0—
net.sf.mpxj10.0.0 ... 9.8.3 (153 versions)16.5.0—
net.sf.mpxj-for-csharp10.0.0 ... 9.8.3 (153 versions)16.5.0—
net.sf.mpxj-for-vb10.0.0 ... 9.8.3 (153 versions)16.5.0—
Maven(1)
PackageVulnerable rangeFixed inDependents
net.sf.mpxj:mpxj10.0.0 ... 9.8.3 (176 versions)16.5.0—
PyPI(1)
PackageVulnerable rangeFixed inDependents
mpxj10.0.0 ... 9.8.3 (127 versions)16.5.0—
RubyGems(1)
PackageVulnerable rangeFixed inDependents
mpxj10.0.0 ... 9.8.3 (177 versions)16.5.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-23 18:25 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescore
  3. 2026-09-23 13:18 UTCEG score recompute
  4. 2026-09-23 12:46 UTCEG score recompute
  5. 2026-09-22 20:32 UTCEG score recompute
  6. 2026-09-22 19:58 UTCEG score recompute
  7. 2026-09-22 19:57 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-65829?
CVE-2026-65829 is a medium vulnerability published on September 22, 2026. 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…
When was CVE-2026-65829 disclosed?
CVE-2026-65829 was first published in the National Vulnerability Database on September 22, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65829 actively exploited?
CVE-2026-65829 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.2% of all scored CVEs.
What is the CVSS score of CVE-2026-65829?
CVE-2026-65829 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-65829?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65829, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-65829

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