Apache Tomcat 4.1.0 through 4.1.39, 5.5.0 through 5.5.27, 6.0.0 through 6.0.18, and possibly earlier versions normalizes the target pathname before filtering the query string when using the RequestDispatcher method, which allows remote attackers to bypass intended access restrictions and conduct directory traversal attacks via .. (dot dot) sequences and the WEB-INF directory in a Request.
Severity
Medium 5.0
Published
16 Jun 2009
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
19% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026