GeoNetwork vulnerable to Remote Code Execution via unsafe Saxon XSLT processor configuration in formatter (CVE-2026-58400) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-58400

GeoNetwork vulnerable to Remote Code Execution via unsafe Saxon XSLT processor configuration in formatter

Answer in brief

CVE-2026-58400 records a Unknown severity 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 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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
Package	Affected range	Fixed version
geonetwork/core-geonetworkgeneric	>= 4.3.0, < 4.4.12 \|\| < 4.2.17	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for geonetwork/core-geonetwork.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

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.