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Advisory record · GHSA-wf6j-gr27-g7ch

GeoServer has a Server-Side Template Injection (SSTI) vulnerability in processing FreeMarker templates

CVSS 7.2 High

Published by the GitHub Advisory Database at 19 Aug 2026, 19:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.geoserver:gs-mainMaven<2.27.02.27.0
org.geoserver:gs-wmsMaven<2.27.02.27.0
org.geoserver.web:gs-web-appMaven<2.27.02.27.0
Identifiers
GHSA-wf6j-gr27-g7ch · CVE-2024-45747
Weakness (CWE)
CWE-749
Tags
Published
19 Aug 2026
Updated
19 Aug 2026

Machine-written summary

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

GeoServer versions before 2.27.0 (org.geoserver:gs-main, org.geoserver:gs-wms and org.geoserver.web:gs-web-app) are vulnerable to server-side template injection through FreeMarker templates. An authenticated administrator who uploads a crafted template can run OS commands and read or write arbitrary files on the server. Upgrade to GeoServer 2.27.0 or later, which adds application properties that restrict the objects templates can access.

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
7.2 High 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 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.