CVE-2026-55864
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.
What this means for your business
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
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Scoring
- CVSS
- Not yet scored
- CVSS v4
- 7.8
- Weakness
- CWE-918
- Assigned by
- security-advisories@github.com
Dates
- Published
- 2026-09-15
- Last modified
- 2026-09-15
- Sources
- NVD
References
- https://github.com/geonetwork/core-geonetwork/commit/17fdae28a5a51996bf5ff7f7e8236332c74eab77
- https://github.com/geonetwork/core-geonetwork/commit/a80d535c842e6af589d0bac37e7fe4ba01193757
- https://github.com/geonetwork/core-geonetwork/pull/9343
- https://github.com/geonetwork/core-geonetwork/pull/9344
- https://github.com/geonetwork/core-geonetwork/releases/tag/4.2.17
- https://github.com/geonetwork/core-geonetwork/releases/tag/4.4.12
- https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-5hx7-j24v-rffj