CVE-2026-42509: Apache Wicket: crafted strings can break out of the JavaScript sequence

[Pedro Henrique Oliveira dos Santos <pedro () apache org>]

Severity: important 

Affected versions:

- Apache Wicket 8.0.0 through 8.17.0
- Apache Wicket 9.0.0 through 9.22.0
- Apache Wicket 10.0.0 through 10.8.0

Description:

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Wicket.

This issue affects Apache Wicket: from 8.0.0 through 8.17.0, 9.0.0, from 10.0.0 through 10.8.0.

Users are recommended to upgrade to version 10.9.0, which fixes the issue.

References:

https://wicket.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-42509