# What changed in python-engineio

> 2 changes in python-engineio 4 from its official release notes, upgrade guides and advisories: 2 security. Each one cited. Sources checked 2026-10-27. HTML: https://unstale.sh/pypi/python-engineio/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## python-engineio 4

### Security

- python-engineio has possible denial of service due to maximum payload size sometimes not being enforced (4.13.2) — [security advisory](https://github.com/advisories/GHSA-M9GH-VJ53-GVH9)
- python-engineio has unbound thread allocation that can cause denial of service (4.13.2) — [security advisory](https://github.com/advisories/GHSA-CGWC-PV48-FHJ5)