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Back to active CVEs
Critical · CVSS 9.1CVE-2026-58400

GeoNetwork vulnerable to Remote Code Execution via unsafe Saxon XSLT processor configuration in formatterCVE-2026-58400

Answer in brief

CVE-2026-58400 records a Critical severity (CVSS 9.1) vulnerability in GeoNetwork vulnerable to Remote Code Execution via unsafe Saxon XSLT processor configuration in formatter. The current sources do not mark it as known exploited. The current feed maps geonetwork/core-geonetwork (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2026Updated Sep 9, 2026Source checked Oct 19, 2026First seen by HOL Sep 3, 2026Material review Sep 9, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps geonetwork/core-geonetwork (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
geonetwork/core-geonetworkgeneric>=4.3.0 <4.4.12 || <4.2.174.4.12, 4.2.17

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for geonetwork/core-geonetwork.
  2. 2Review the reported fix. Update geonetwork/core-geonetwork to 4.4.12 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 3, 2026

Sources and claim methodology

  • Source referencedocs.geonetwork-opensource.org
  • Source referencedocs.geonetwork-opensource.org
  • GitHub security advisorygithub.com
  • Source referencethehackernews.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • JDBC LogFactory 任意类加载/构造导致潜在 RCEAlso CWE-470
  • Chamilo LMS Ticket TicketManager.php addProject cross site scriptingAlso CWE-94
  • diem-project diem Version Check Service dmAdminCtrl.js html cross site scriptingAlso CWE-94
  • diem-project diem Administrative Console actions.class.php append cross site scriptingAlso CWE-94
  • diem-project diem dmWidget dmBaseLinkTag.php text cross site scriptingAlso CWE-94
  • unslothai unsloth sentence_transformer.py externally-controlled input to select classes or codeAlso CWE-470

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-94, CWE-470
Source
CVE List V5
Source checked
Oct 19, 2026
References
4 linked sources
Open source record