CVE-2026-58400
Reported by GitHub_M · Published September 3, 2026
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.
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| geonetwork | core-geonetwork | >= 4.3.0, < 4.4.12, < 4.2.17 |
| geonetwork | core-geonetwork | >= 4.3.0, < 4.4.12, < 4.2.17, >= 4.3.0, < 4.4.12 |
Timeline
- Sep 3, 2026 VulnCheck KEV Exploitation
- Sep 3, 2026 Coalition ESS Score
- Sep 3, 2026 CVE Published
- Sep 4, 2026 EPSS Score
- Sep 4, 2026 CVE Updated
- Sep 5, 2026 EPSS Score
- Sep 6, 2026 EPSS Score
References
- https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-x898-729x-cc3r x_refsource_CONFIRM
- https://docs.geonetwork-opensource.org/4.2/overview/change-log/version-4.2.17 x_refsource_MISC
- https://docs.geonetwork-opensource.org/4.4/overview/change-log/version-4.4.12 x_refsource_MISC
- https://thehackernews.com/2026/09/geonetwork-fixes-unauthenticated-rce.html x_refsource_MISC