Protection mechanism failure in Apache Wicket - CVE-2026-66391
Published: August 24, 2026
Vulnerability identifier: #VU144755
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-66391
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass content security policy protections.
The vulnerability exists due to protection mechanism failure and use of insufficiently random values in csp header handling when processing web requests. A remote attacker can trigger responses with leaked or missing csp headers to bypass content security policy protections.
Affected software
Apache Wicket
How to mitigate CVE-2026-66391
Install security update from vendor's website.
Apache Wicket - update to 10.10.0