CVE-2026-4813 Code injection in the Lutece Core
Authenticated administrators can execute arbitrary code on the server by uploading malicious XSL stylesheets due to insecure XML processing configuration.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4813?
CVE-2026-4813 is a critical code injection vulnerability in Lutece Core, published on 1 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability in the Lutece Core XSL export management module up to version 7.1.7, which allows authenticated administrators to execute code remotely. The XML/XSLT processing configuration does not enable secure processing mode (FEATURE_SECURE_PROCESSING), allowing Java extension functions to be executed from malicious XSL stylesheets. An attacker with administrator privileges can upload a manipulated XSL transformation file and trigger its execution during user export operations, resulting in the execution of arbitrary code on the server.
Weakness: CWE-94
Which versions are affected by CVE-2026-4813?
How do I fix CVE-2026-4813?
No fix has been published for CVE-2026-4813 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-4813 being exploited?
There is no known exploitation of CVE-2026-4813 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-wvvp-v69c-rj86.