{"cve":"CVE-2026-55864","nvd":{"published":"2026-09-15T16:17:16.517","modified":"2026-09-30T17:51:56.193","status":"Deferred","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.","cvss_v4":{"vector":"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","score":7.8},"cvss_v3":null,"cwes":["CWE-918"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-55864","score":0.00587,"percentile":0.4777,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-5hx7-j24v-rffj","url":"https://osv.dev/vulnerability/GHSA-5hx7-j24v-rffj","summary":"GeoNetwork Web Module: Unauthenticaded Server-Side Request Forgery  in SLD Tool","modified":"2026-09-10T00:10:57.647104Z","packages":[{"ecosystem":"Maven","name":"org.geonetwork-opensource:gn-web-app","purl":"pkg:maven/org.geonetwork-opensource/gn-web-app","ranges":[">=4.4.0 <4.4.12"],"fixed":["4.4.12"]},{"ecosystem":"Maven","name":"org.geonetwork-opensource:gn-web-app","purl":"pkg:maven/org.geonetwork-opensource/gn-web-app","ranges":[">=4.0.0 <4.2.17"],"fixed":["4.2.17"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}