CVE-2026-58400: geonetwork core-geonetwork Code Injection

Vulnerability summary

CVE-2026-58400 is a critical (CVSS 9.1) Code Injection vulnerability in geonetwork core-geonetwork. It is known to be exploited: ENISA lists it, first on 02-09-2026. EPSS estimates a 1.19% chance of exploitation in the next 30 days, higher than 67.4% of scored vulnerabilities.

Timeline

1. 02-09-2026
   Added to ENISA KEVAdded to the ENISA known exploited vulnerabilities catalog.
2. 03-09-2026
   PublishedVulnerability first disclosed.
3. 04-09-2026
   Last modifiedVulnerability information updated.

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.

• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
• CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code.