# CVE-2026-58400

## Summary

- **CVE ID:** CVE-2026-58400
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-94, CWE-470
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 4, 2026

## Description

GeoNetwork is a catalog application to manage spatially referenced resources. Prior to versions 4.4.12 and 4.2.17, the Saxon XSLT processor used to render formatters is configured without secure processing (`FEATURE_SECURE_PROCESSING`) and without disabling Java extension functions (`ALLOW_EXTERNAL_FUNCTIONS`). Any stylesheet loaded by GeoNetwork can therefore invoke
`java.lang.Runtime.exec()` or `java.lang.ProcessBuilder` directly, achieving arbitrary command execution as the GeoNetwork process user. A user with sufficient privileges to upload a formatter can deliver a `.xsl` file containing Java extension call that execute arbitrary OS commands with the privileges of the GeoNetwork process. The issue is patched in GeoNetwork versions 4.4.12 and 4.2.17.

## Affected Products

- geonetwork — core-geonetwork (>= 4.3.0, < 4.4.12)
- geonetwork — core-geonetwork (< 4.2.17)

## References

- [CNA](https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-x898-729x-cc3r)
- [CNA](https://docs.geonetwork-opensource.org/4.2/overview/change-log/version-4.2.17)
- [CNA](https://docs.geonetwork-opensource.org/4.4/overview/change-log/version-4.4.12)
- [CNA](https://thehackernews.com/2026/09/geonetwork-fixes-unauthenticated-rce.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.19%
- **EPSS Percentile:** 66.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._