# What changed in protobuf

> 1 change in protobuf 6 from its official release notes, upgrade guides and advisories: 1 security. Each one cited. Sources checked 2026-10-27. HTML: https://unstale.sh/pypi/protobuf/

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

## protobuf 6

### Security

- protobuf affected by a JSON recursion depth bypass (5.29.6, 6.33.5) — [security advisory](https://github.com/advisories/GHSA-7GCM-G887-7QV7)