EUVD-2026-70988

fastify vulnerable to authentication bypass via malformed URLs reaching encapsulated not-found handlers...

CVE-2026-76169

fastify versions = 4.0.0 and before 5.12.2 can route a malformed URL sent under one plugin prefix to the custom not-found handler of a different sibling plugin, and invoke it without the preHandler hook declared for that handler. The internal not-found router for encapsulated handlers dispatches...

PT-2026-85449

Name of the Vulnerable Software and Affected Versions fastify versions 4.0.0 through 5.12.1 Description An unauthenticated attacker can bypass authentication hooks and break prefix encapsulation by sending a malformed URL. The internal not-found router for encapsulated handlers dispatches malform...

L2 network security controls can be bypassed using VLAN 0 stacking and/or 802.3 headers

Overview Layer-2 L2 network security controls provided by various devices, such as switches, routers, and operating systems, can be bypassed by stacking Ethernet protocol headers. An attacker can send crafted packets through vulnerable devices to cause Denial-of-service DoS or to perform a...