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...

GHSA-628H-Q48J-JR6Q Phoenix: Long-poll NDJSON body splitting causes large memory allocation

Summary An unauthenticated denial-of-service vulnerability in Phoenix's long-poll transport allows a remote client to allocate a large amount of memory with a HTTP request. A handful of concurrent requests can be sufficient to let the node run out of memory. See also...

Allocation of Resources Without Limits or Throttling

Overview phoenix is a The official JavaScript client for the Phoenix web framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the Elixir.Phoenix.Transports.LongPoll POST requests handling with Content-Type: application/x-ndjson. A...

Allocation of Resources Without Limits or Throttling

Overview org.webjars.npm:phoenix is a The official JavaScript client for the Phoenix web framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the Elixir.Phoenix.Transports.LongPoll POST requests handling with Content-Type:...

CVE-2026-32689

Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix allows a denial of service via the long-poll transport's NDJSON body handling. In 'Elixir.Phoenix.Transports.LongPoll':publish/4, when a POST request is received with Content-Type: application/x-ndjson,...

CVE-2026-32689 Long-poll NDJSON body splitting causes unbounded memory allocation in Phoenix

Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix allows a denial of service via the long-poll transport's NDJSON body handling. In 'Elixir.Phoenix.Transports.LongPoll':publish/4, when a POST request is received with Content-Type: application/x-ndjson,...

EEF-CVE-2026-32689 Long-poll NDJSON body splitting causes unbounded memory allocation in Phoenix

Summary Allocation of Resources Without Limits or Throttling vulnerability in phoenixframework phoenix allows a denial of service via the long-poll transport's NDJSON body handling. In 'Elixir.Phoenix.Transports.LongPoll':publish/4, when a POST request is received with Content-Type:...

PT-2026-37059

Name of the Vulnerable Software and Affected Versions phoenix versions 1.7.0 through 1.7.21 phoenix version 1.8.6 Description An issue in the long-poll transport's NDJSON body handling allows a denial of service. In the publish/4 function of Elixir.Phoenix.Transports.LongPoll, POST requests with...