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

Advisory record · `GHSA-5hx7-j24v-rffj`

- **Identifiers:** `GHSA-5hx7-j24v-rffj` · `CVE-2026-55864`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 9 Sept 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

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.

## Affected packages

- `org.geonetwork-opensource:gn-web-app` (Maven): affected `>=4.4.0, <4.4.12 || >=4.0.0, <4.2.17`; fixed in `4.4.12`, `4.2.17`

## 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

- 7.8 High, CVSS 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`, from 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

- 31 Oct 2026, 14:18 UTC: First seen by agentprime
- 31 Oct 2026, 14:18 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-5hx7-j24v-rffj)

## Sources

- [GitHub Advisory Database: GHSA-5hx7-j24v-rffj](https://github.com/advisories/GHSA-5hx7-j24v-rffj)
- [OSV: GHSA-5hx7-j24v-rffj](https://osv.dev/vulnerability/GHSA-5hx7-j24v-rffj)
- <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>

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.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-5hx7-j24v-rffj>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-5hx7-j24v-rffj/>. Everything for agents: <https://agentprime.io/llms.txt>.