CVE-2026-58400
OSGeo geonetwork Improper Control of Generation of Code ('Code Injection')
Published Sep 3, 2026 · corrected/updated Sep 3, 2026 · Geonetwork Core-Geonetwork · evidence confidence very high
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 ( ) and without disabling Java extension functions ( ). Any stylesheet loaded by GeoNetwork can therefore invoke or directly, achieving arbitrary command execution as the GeoNetwork process user. A user with sufficient privileges to upload a formatter can deliver a file containing Java extension call that execute arbitrary OS commands with the privileges of the GeoNetwork process. The issue
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-58400 is a unknown public vulnerability record for Geonetwork Core-Geonetwork. CISA lists it as known exploited. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether Geonetwork Core-Geonetwork is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: Geonetwork Core-Geonetwork. Published remediation guidance: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: no CVSS/EPSS yet. CISA lists it as known exploited. Sources contributing to this record: vulncheck_kev. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Confirmed in CISA KEV since Sep 3, 2026. Listed in CISA KEV and VulnCheck KEV.
Patch and remediation
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 3, 2026 · VulnCheck KEV
Detected
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 ( ) and without disabling Java extension functions ( ). Any stylesheet loaded by GeoNetwork can therefore invoke or directly, achieving arbitrary command execution as the GeoNetwork process user
Sep 3, 2026 · CISA KEV
Known exploited
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected
- vendor Geonetwork Core-Geonetworkversion unspecified
Sources
- VulnCheck KEVConfirmed exploitationCVE-2026-58400
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 ( ) and without disabling Java extension functions ( ). Any stylesheet loa
vulncheck.com