{"id":"UBUNTU-CVE-2026-84382","details":"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.","modified":"2026-10-17T13:01:12.715367392Z","published":"2026-09-02T19:18:00Z","upstream":["CVE-2026-84382"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-84382"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-84382"},{"type":"REPORT","url":"https://github.com/pydantic/httpx2/security/advisories/GHSA-8xx6-hgc6-gc2m"},{"type":"REPORT","url":"https://github.com/pydantic/httpx2/pull/1126"},{"type":"REPORT","url":"https://github.com/pydantic/httpx2/commit/4fd0c70a3f207c618b145934792f791bccfb39f8"},{"type":"REPORT","url":"https://github.com/pydantic/httpx2/releases/tag/v2.12.0"}],"affected":[{"package":{"name":"python-httpx2","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/python-httpx2?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.5.0-1","binary_name":"python3-httpcore2"},{"binary_version":"2.5.0-1","binary_name":"python3-httpx2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84382.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}