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Advisory record · GHSA-5hx7-j24v-rffj

GeoNetwork Web Module: Unauthenticaded Server-Side Request Forgery in SLD Tool

CVSS 7.8 HighEPSS 0.014 · 73rd percentile

Published by the GitHub Advisory Database at 9 Sept 2026, 23:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.geonetwork-opensource:gn-web-appMaven>=4.4.0, <4.4.12 || >=4.0.0, <4.2.174.4.12, 4.2.17
Identifiers
GHSA-5hx7-j24v-rffj · CVE-2026-55864
Weakness (CWE)
CWE-918
Tags
Published
9 Sept 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GeoNetwork's gn-web-app Maven package is affected in versions 4.4.0 to before 4.4.12 and 4.0.0 to before 4.2.17. An unauthenticated attacker can use the SLD tool endpoint, which fetches a caller-supplied WMS server URL without validation, to make the server send requests to internal hosts and read back XML responses. Upgrade to 4.4.12 or 4.2.17.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.8 High 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.014, the 73rd percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:18 UTC First seen by agentprime
  2. 31 Oct 2026, 14:18 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.