Cross-site scripting in Apache Wicket - CVE-2026-42509
Published: August 25, 2026
Vulnerability identifier: #VU145307
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-42509
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script code in a victim's browser.
The vulnerability exists due to cross-site scripting in web page generation when processing crafted strings in JavaScript sequences. A remote attacker can supply a specially crafted string to execute arbitrary script code in a victim's browser.
Affected software
Apache Wicket
How to mitigate CVE-2026-42509
Install security update from vendor's website.
Apache Wicket - update to 10.9.0