CVE-2026-91999: Apache Sling XSS: Improper escaping in the XSS Webconsole plugin

[Joerg Hoh <joerghoh () apache org>]

Severity: low 

Affected versions:

- Apache Sling XSS before 2.4.12

Description:

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Sling XSS.



This issue affects Apache Sling XSS: before 2.4.12.



Users are recommended to upgrade to version 2.4.12, which fixes the issue.

This issue is being tracked as SLING-13335 

Credit:

The Apache Software Foundation (finder)
Claude Code (tool)

References:

https://sling.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-91999
https://issues.apache.org/jira/browse/SLING-13335