CVE-2026-84382

Name	CVE-2026-84382
Description	HTTPX2 is a next generation HTTP client for Python. Prior to 2.12.0, the HTTPX2 content decoders in src/httpx2/httpx2/_decoders.py fully inflate each gzip, deflate, br, or zstd network chunk before iter_bytes() or aiter_bytes() yields bounded pieces to the application. A 64 KiB compressed chunk can expand to approximately 64 MiB in one intermediate allocation, so an attacker-controlled or compromised server can cause severe memory pressure or out-of-memory process termination even when the application streams the response. This issue is fixed in version 2.12.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-httpx2 (PTS)	forky	2.5.0-1	vulnerable
	sid	2.12.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-httpx2	source	(unstable)	2.12.0-1

Notes

https://github.com/pydantic/httpx2/security/advisories/GHSA-8xx6-hgc6-gc2m
https://github.com/pydantic/httpx2/pull/1126
Fixed by: https://github.com/pydantic/httpx2/commit/4fd0c70a3f207c618b145934792f791bccfb39f8 (v2.12.0)