---
cve: "CVE-2026-58400"
severity: "CRITICAL"
cvss: 9.1
epss: "1.2%"
vendor: "geonetwork"
kev: false
exploited: true
published: "2026-09-03 18:17:22"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T18:37:46+01:00"
---

# CVE-2026-58400

> 9.1 CRITICAL · 🔓 Exploited · 🧪 PoC

## Beschreibung

GeoNetwork is a catalog application to manage spatially referenced resources. Prior to versions 4.4.12 and 4.2.17, the Saxon XSLT processor used to render formatters is configured without secure processing (`FEATURE_SECURE_PROCESSING`) and without disabling Java extension functions (`ALLOW_EXTERNAL_FUNCTIONS`). Any stylesheet loaded by GeoNetwork can therefore invoke
`java.lang.Runtime.exec()` or `java.lang.ProcessBuilder` directly, achieving arbitrary command execution as the GeoNetwork process user. A user with sufficient privileges to upload a formatter can deliver a `.xsl` file containing Java extension call that execute arbitrary OS commands with the privileges of the GeoNetwork process. The issue is patched in GeoNetwork versions 4.4.12 and 4.2.17.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-09-04 13:42:08
- CNA-CVSS: **9.1** (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-470** — Use of Externally-Controlled Input to Select Classes or Code
  The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code.
- **CWE-94** — Improper Control of Generation of Code
  The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

## Angriffsmuster (CAPEC)

- [CAPEC-138 — Reflection Injection](https://capec.mitre.org/data/definitions/138.html) _(Severity: Very High)_

## Patch verfügbar (OSV)

- 45f1bcb4ec72f17d5990ffa55469b66a79dcbfc4 (Commit)
- f91487a48ed51b6abc944e5a35ee3b147ccecdb6 (Commit)

## Referenzen

- <https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-x898-729x-cc3r>
- <https://docs.geonetwork-opensource.org/4.2/overview/change-log/version-4.2.17>
- <https://docs.geonetwork-opensource.org/4.4/overview/change-log/version-4.4.12>
- <https://thehackernews.com/2026/09/geonetwork-fixes-unauthenticated-rce.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-58400/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_