---
id: CVE-2026-55864
title: GeoNetwork is a catalog application to manage spatially referenced resources
summary: >-
  GeoNetwork is a catalog application to manage spatially referenced resources.
  Prior to 4.2.17 and 4.4.12, POST /api/tools/ogc/sld accepted a caller-supplied
  WMS server URL and performed a server-side HTTP GET without destination
  validati…
severity: high
cvss: 7.8
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N'
cwe:
  - CWE-918
vendor: geonetwork
product: core-geonetwork
affected:
  - 'core-geonetwork >= 4.0.0, < 4.2.17'
  - 'core-geonetwork >= 4.4.0, < 4.4.12'
patched:
  - 'org.geonetwork-opensource:gn-web-app 4.4.12'
  - 'org.geonetwork-opensource:gn-web-app 4.2.17'
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T16:17:10.503'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55864'
references:
  - url: >-
      https://github.com/geonetwork/core-geonetwork/commit/17fdae28a5a51996bf5ff7f7e8236332c74eab77
    label: security-advisories@github.com
  - url: >-
      https://github.com/geonetwork/core-geonetwork/commit/a80d535c842e6af589d0bac37e7fe4ba01193757
    label: security-advisories@github.com
  - url: 'https://github.com/geonetwork/core-geonetwork/pull/9343'
    label: security-advisories@github.com
  - url: 'https://github.com/geonetwork/core-geonetwork/pull/9344'
    label: security-advisories@github.com
  - url: 'https://github.com/geonetwork/core-geonetwork/releases/tag/4.2.17'
    label: security-advisories@github.com
  - url: 'https://github.com/geonetwork/core-geonetwork/releases/tag/4.4.12'
    label: security-advisories@github.com
  - url: >-
      https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-5hx7-j24v-rffj
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-5hx7-j24v-rffj'
tags:
  - nvd
  - cve.org
  - ghsa
  - maven
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-16T15:42:02.665555Z'
cvssSource: cna
aliases:
  - GHSA-5hx7-j24v-rffj
ecosystem: maven
ingestedAt: '2026-09-10T00:26:24.579Z'
epss: 0.00587
epssPercentile: 0.45764
---

## Overview

GeoNetwork is a catalog application to manage spatially referenced resources. Prior to 4.2.17 and 4.4.12, POST /api/tools/ogc/sld accepted a caller-supplied WMS server URL and performed a server-side HTTP GET without destination validation. An anonymous attacker could make the GeoNetwork server send requests to internal hosts that are not publicly reachable. When the outbound response was XML, the endpoint could store and return the fetched body, making the request forgery non-blind and enabling internal data disclosure, authorization bypass, and network reconnaissance. This issue is fixed in versions 4.2.17 and 4.4.12.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55864)

Affected packages:

- `org.geonetwork-opensource:gn-web-app >= 4.4.0, <= 4.4.11`
- `org.geonetwork-opensource:gn-web-app >= 4.0.0, <= 4.2.16`

Patched in:

- `org.geonetwork-opensource:gn-web-app 4.4.12`
- `org.geonetwork-opensource:gn-web-app 4.2.17`

Source: https://github.com/advisories/GHSA-5hx7-j24v-rffj