Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| geonetwork | core-geonetwork | >= 4.0.0, < 4.2.17, >= 4.4.0, < 4.4.12 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- GeoNetwork - Server-Side Request Forgery (SSRF) http/cves/2026/CVE-2026-55864.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.geonetwork-opensource:gn-web-app | >= 4.4.0, < 4.4.12 | 4.4.12 | GHSA-5hx7-j24v-rffj |
| Maven | org.geonetwork-opensource:gn-web-app | >= 4.0.0, < 4.2.17 | 4.2.17 | GHSA-5hx7-j24v-rffj |
Advisories 1
- WID-SEC-2026-3299 GeoNetwork: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Sep 15, 2026
References
- https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-5hx7-j24v-rffj
- https://github.com/geonetwork/core-geonetwork/pull/9343
- https://github.com/geonetwork/core-geonetwork/pull/9344
- https://github.com/geonetwork/core-geonetwork/commit/17fdae28a5a51996bf5ff7f7e8236332c74eab77
- https://github.com/geonetwork/core-geonetwork/commit/a80d535c842e6af589d0bac37e7fe4ba01193757
- https://github.com/geonetwork/core-geonetwork/releases/tag/4.2.17
- https://github.com/geonetwork/core-geonetwork/releases/tag/4.4.12