There is 1 open security issue in bookworm.
1 important issue:
- CVE-2025-57804:
h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurs when servers downgrade HTTP/2 requests to HTTP/1.1 without properly validating header names/values, enabling attackers to manipulate request boundaries and bypass security controls. This issue has been patched in version 4.3.0.
![[bug history graph]](https://qa.debian.org/data/bts/graphs/p/python-h2.png){kind=link}