CVE-2026-55203 | HAProxy up to 3.4.0 FCGI Framing Parser drl integer overflow

June 18, 2026 Yanac

A vulnerability marked as problematic has been reported in HAProxy up to 3.4.0. This vulnerability affects unknown code of the component FCGI Framing Parser. Performing a manipulation of the argument drl results in integer overflow.

This vulnerability was named CVE-2026-55203. The attack may be initiated remotely. There is no available exploit.

To fix this issue, it is recommended to deploy a patch.VulDB Recent EntriesRead More