CVE-2026-43975: Apache Wicket

Medium severity, CVSS 6.5. EPSS: 1% chance of exploitation in the next 30 days.

FolderUploadsFileManager in Apache Wicket does not validate or sanitize the uploadFieldId parameter or the clientFileName before constructing file paths, allowing an unauthenticated attacker to write arbitrary files outside the intended upload directory or read files from arbitrary locations on the server. This issue affects Apache Wicket: from 8.0.0 through 8.17.0, from 9.0.0 through 9.22.0, from 10.0.0 through 10.8.0. Users are recommended to upgrade to version 10.9.0, which fixes the issue.

Affected products

• Apache Wicket: from 8.0.0, up to and including 8.17.0; from 9.0.0, up to and including 9.22.0; from 10.0.0, before 10.9.0 (fixed in 10.9.0)

Published 2026-05-06. Last modified 2026-06-17.