https://seclists.org/oss-sec/2026/q3/285: CVE-2026-66391: Apache Wicket: leaked and missing CSP headers

Published Jul 27, 2026
·
Updated

Affected Software

2 affected components
Apache wicket>=9.0.0<=9.23.0
Apache wicket>=10.0.0<=10.9.0
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Frequently Asked Questions

1

What is the severity of CVE-2026-66391?

The severity of CVE-2026-66391 is classified as important.

2

Which versions of Apache Wicket are affected by CVE-2026-66391?

CVE-2026-66391 affects Apache Wicket versions 9.0.0 through 9.23.0 and 10.0.0 through 10.9.0.

3

How do I fix CVE-2026-66391?

To fix CVE-2026-66391, upgrade to a patched version of Apache Wicket beyond 10.9.0 or 9.23.0.

4

What type of vulnerability is CVE-2026-66391?

CVE-2026-66391 is a Use of Insufficiently Random Values and Protection Mechanism Failure vulnerability.

5

What impact does CVE-2026-66391 have on Apache Wicket?

CVE-2026-66391 can lead to security risks due to leaked and missing Content Security Policy headers.

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