Summary
GeoNetwork Web Module: Unauthenticaded Server-Side Request Forgery in SLD Tool
An unauthenticated server-side request forgery vulnerability lets any anonymous user make the GeoNetwork server issue arbitrary outbound HTTP requests. This gives an external attacker a position inside the server's network, making it possible to make internal requests no matter if the response is XML-type or not.
The SLD tooling endpoint POST /api/tools/ogc/sld takes a caller-supplied WMS server URL and performs a server-side HTTP GET to it, with no validation. The fetched body can also be stored and downloaded if the output of the outbound request is in XML format, making the SSRF non-blind.
Resolution
Patched releases:
- 4.4.12
- 4.2.17
Resources
Impact
Any unauthenticated user can make the server send arbitrary HTTP requests to internal hosts it would never expose publicly, and read the responses back if the request responses are XML. This enables internal data disclosure, for example, configuration files that return as XML, authorization bypass, and reconnaissance of the internal network all from an anonymous position.
Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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See it in your environmentNew to Kodem? Get a demo →Remediation advice
org.geonetwork-opensource:gn-web-app to 4.4.12 or later; org.geonetwork-opensource:gn-web-app to 4.2.17 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2026-55864? CVE-2026-55864 is a high-severity server-side request forgery (SSRF) vulnerability in org.geonetwork-opensource:gn-web-app (maven), affecting versions >= 4.4.0, <= 4.4.11. It is fixed in 4.4.12, 4.2.17. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
- Which versions of org.geonetwork-opensource:gn-web-app are affected by CVE-2026-55864? org.geonetwork-opensource:gn-web-app (maven) versions >= 4.4.0, <= 4.4.11 is affected.
- Is there a fix for CVE-2026-55864? Yes. CVE-2026-55864 is fixed in 4.4.12, 4.2.17. Upgrade to this version or later.
- Is CVE-2026-55864 exploitable, and should I be worried? Whether CVE-2026-55864 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-55864 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-55864?
- Upgrade
org.geonetwork-opensource:gn-web-appto 4.4.12 or later - Upgrade
org.geonetwork-opensource:gn-web-appto 4.2.17 or later
- Upgrade