PYSEC-2026-3033 python-engineio has possible denial of service due to maximum payload size sometimes not being enforced

Impact There are two specific configurations of the python-engineio server in which the size of incoming messages is not checked before the messages are loaded into memory. An attacker can take advantage of these to cause unnecessary memory allocations in the python-engineio server. The two cases...

Allocation of Resources Without Limits or Throttling

Overview python-engineio is a Python implementation of the Engine.IO realtime client and server. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the handling of incoming messages when using ASGI with the long polling transport for POST...