Vulnerabilities in pkg:maven/org.geonetwork-opensource/gn-web-app

PACKAGE
Advisory Identifier: GHSA-5hx7-j24v-rffj
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Advisory Summary

CVE-2026-55864 is a HIGH unauthenticaded server-side request forgery vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting GeoNetwork Web Module libraries in the Maven ecosystem. The issue involves unauthenticaded server-side request forgery in sld tool. Remediation is available by upgrading affected packages to version 4.4.12, 4.2.17.

2 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/org.geonetwork-opensource/gn-web-app

2 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/org.geonetwork-opensource/gn-web-app. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-5hx7-j24v-rffj CVE-2026-55864 HIGH GeoNetwork Web Module: Unauthenticaded Server-Side Request Forgery in SLD Tool
GHSA-2p76-gc46-5fvc - HIGH GeoNetwork affected by XML External Entity (XXE) processing vulnerability in WFS indexing REST API endpoint

CVE-2026-55864 at a Glance

CVE Identifier CVE-2026-55864
GHSA Identifier GHSA-5hx7-j24v-rffj
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product GeoNetwork Web Module
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-55864

To remediate this vulnerability, upgrade all affected GeoNetwork Web Module dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.geonetwork-opensource:gn-web-app fixed: 4.4.12 
<dependency>
    <groupId>org.geonetwork-opensource</groupId>
    <artifactId>gn-web-app</artifactId>
    <version>4.4.12</version>
</dependency>
org.geonetwork-opensource:gn-web-app fixed: 4.2.17 
<dependency>
    <groupId>org.geonetwork-opensource</groupId>
    <artifactId>gn-web-app</artifactId>
    <version>4.2.17</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.geonetwork-opensource

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-55864, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.geonetwork-opensource

Analyze the terminal output to locate any version of GeoNetwork Web Module in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.12), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.geonetwork-opensource command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In GeoNetwork Web Module, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary 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. ### 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. ### Resolution Patched releases: * 4.4.12 * 4.2.17 ### Resources * https://github.com/geonetwork/core-geonetwork/pull/9343

CVE-2026-55864 Affected GeoNetwork Web Module Versions

2 component(s)
Fixed Versions:
4.4.124.2.17
Product / Package Ecosystem Affected Versions Fixed Version
org.geonetwork-opensource:gn-web-app
maven/org.geonetwork-opensource/gn-web-app
Maven
≥ 4.4.0
< 4.4.12
4.4.12
org.geonetwork-opensource:gn-web-app
maven/org.geonetwork-opensource/gn-web-app
Maven
≥ 4.0.0
< 4.2.17
4.2.17

References

GitHub Advisory / Wiki ADVISORY
https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-5hx7-j24v-rffj
GeoNetwork Web Module Source Repository REPOSITORY
https://github.com/geonetwork/core-geonetwork/pull/9343
GeoNetwork Web Module Source Repository REPOSITORY
https://github.com/geonetwork/core-geonetwork

Frequently Asked Questions

What is CVE-2026-55864?
CVE-2026-55864 is a security vulnerability in GeoNetwork Web Module involving Unauthenticaded Server-Side Request Forgery in SLD Tool under CWE-918: Server-Side Request Forgery (SSRF).
Which GeoNetwork Web Module versions are affected?
Affected versions include releases prior to 4.4.12, 4.2.17 across affected packages: org.geonetwork-opensource:gn-web-app.
What version fixes CVE-2026-55864?
Upgrading to 4.4.12, 4.2.17 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gn-web-app affected?
Yes, org.geonetwork-opensource:gn-web-app is affected in releases prior to 4.4.12, 4.2.17. Upgrade your dependency to 4.4.12, 4.2.17 or later.
What CWE is associated with CVE-2026-55864?
CVE-2026-55864 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Maven dependencies for CVE-2026-55864?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.geonetwork-opensource'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5hx7-j24v-rffj",
  "modified" : "2026-09-09T23:43:51Z",
  "published" : "2026-09-09T23:43:51Z",
  "aliases" : [ "CVE-2026-55864" ],
  "summary" : "GeoNetwork Web Module: Unauthenticaded Server-Side Request Forgery  in SLD Tool",
  "details" : "### Summary\nAn 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.\n\nThe 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.\n\n### Impact\nAny 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.\n\n### Resolution \n\nPatched releases:\n\n* 4.4.12\n* 4.2.17\n\n### Resources\n\n* https://github.com/geonetwork/core-geonetwork/pull/9343",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.geonetwork-opensource:gn-web-app"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.4.0"
      }, {
        "fixed" : "4.4.12"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.4.11"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.geonetwork-opensource:gn-web-app"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.2.17"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.2.16"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-5hx7-j24v-rffj"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/geonetwork/core-geonetwork/pull/9343"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/geonetwork/core-geonetwork"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-09T23:43:51Z",
    "nvd_published_at" : null
  }
}