{"action":"Upgrade httpx2 to 2.11.0 or later.","affected":[{"fixed":"2.11.0","introduced":"0"}],"component":"httpx2","cve_ids":["CVE-2026-84380"],"ecosystem":"PyPI","epss":0.00221,"exploited":false,"fixed_versions":["2.11.0"],"ghsa_id":"GHSA-pf96-p4fj-6566","id":"tcs_01M5KH854CP59429DJC4P4MK8C","modified_at":"2026-09-10T12:15:06.096986959Z","published_at":"2026-09-10T09:45:01.065667Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3849","https://github.com/pydantic/httpx2/security/advisories/GHSA-pf96-p4fj-6566","https://nvd.nist.gov/vuln/detail/CVE-2026-84380","https://github.com/pydantic/httpx2/pull/1137","https://github.com/pydantic/httpx2/commit/829b93a2393212996f613e635261f777d9ec6eab","https://github.com/pydantic/httpx2","https://github.com/pydantic/httpx2/releases/tag/v2.11.0","https://pypi.org/project/httpx2","https://github.com/advisories/GHSA-pf96-p4fj-6566"],"severity":{"label":"medium","score":5.6},"sources":[{"source":"osv","source_id":"PYSEC-2026-3849","url":"https://osv.dev/vulnerability/PYSEC-2026-3849"}],"summary":"HTTPX2: Conflicting Content-Length and Transfer-Encoding headers can be auto-generated"}