CVE-2026-84380

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{"bugzilla": {"description": "httpx2: HTTPX2: Request Smuggling and Connection Desynchronization via Conflicting HTTP Headers", "id": "2527695", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2527695"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-444", "details": ["A flaw was found in HTTPX2, a Python HTTP client. The `Request._prepare()` function can incorrectly add a `Content-Length` header to a request that already includes a `Transfer-Encoding` header. This conflict in HTTP framing headers can lead to request smuggling or connection desynchronization. This could allow an attacker to bypass security controls or interfere with network traffic."], "name": "CVE-2026-84380", "package_state": [{"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Fix deferred", "package_name": "lightspeed-core/lightspeed-stack-rhel9", "product_name": "Lightspeed Core"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-automl-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-kserve-autogluon-server-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Fix deferred", "package_name": "rhoai/odh-kserve-storage-initializer-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-09-02T17:58:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-84380\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-84380\nhttps://github.com/pydantic/httpx2/commit/829b93a2393212996f613e635261f777d9ec6eab\nhttps://github.com/pydantic/httpx2/pull/1137\nhttps://github.com/pydantic/httpx2/releases/tag/v2.11.0\nhttps://github.com/pydantic/httpx2/security/advisories/GHSA-pf96-p4fj-6566"], "threat_severity": "Moderate"}

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