Tag
medium
advisory
CVE-2026-55204: HAProxy Null Pointer Dereference Leads to Denial of Service
2 rules 1 TTPAn unauthenticated attacker can exploit CVE-2026-55204, a null pointer dereference vulnerability in HAProxy through version 3.4.0, by triggering excessive HPACK dynamic table insertions under memory pressure, causing HAProxy worker processes to crash and resulting in a denial of service.
HAProxy 3.4.0
denial-of-service
vulnerability
HAProxy
CVE-2026-55204
2r
1t
high
advisory
CVE-2026-55203 HAProxy Integer Overflow in FastCGI Handling
2 rules 3 TTPsAn integer overflow vulnerability (CVE-2026-55203) in HAProxy through version 3.4.0 allows malicious FastCGI backends to desynchronize the FCGI framing parser, leading to request routing errors, response smuggling, or memory safety issues.
HAProxy
vulnerability
fastcgi
integer-overflow
webserver
proxy
2r
3t