CVE-2026-66390: Apache Wicket: crafted Link URL strings can break out of the JavaScript sequence

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-27 · updated 2026-10-24
Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Wicket. This issue affects Apache Wicket: from 9.0.0 through 9.23.0, from 10.0.0 through 10.9.0. Users are recommended to upgrade to version 10.10.0, which fixes the issue.

Affected products

Apache Software Foundation Apache Wicket: from 9.0.0 through 9.23.0; from 10.0.0 before 10.10.0 — fixed in 10.10.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Wicket 10.10.0. Check the vendor advisory for mitigations.

References

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