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CVE-2026-58400 is a vulnerability classified as Improper Control of Generation of Code ('Code Injection') and Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection'), affecting core-geonetwork (affected versions: >= 4.3.0, < 4.4.12 and < 4.2.17). This vulnerability is rated Critical, with a CVSS score of 9.1. Current sources do not report this vulnerability as exploited.
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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.
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