CVE-2026-56811 Phoenix transports do not limit channel joins per connection, enabling process-exhaustion denial of service

Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix Phoenix.Socket module allows an unauthenticated attacker to cause a denial of service against any endpoint that mounts a Phoenix socket with a reachable channel transport WebSocket or LongPoll. This...

PT-2026-56201

Name of the Vulnerable Software and Affected Versions phoenix versions 0.11.0 through 1.5.14 phoenix versions 1.6.0-rc.0 through 1.6.16 phoenix versions 1.7.0-rc.0 through 1.7.23 phoenix versions 1.8.0-rc.0 through 1.8.8 Description An unauthenticated attacker can cause a denial of service agains...