{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84382", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-01T16:27:58.130Z", "datePublished": "2026-09-02T18:03:05.010Z", "dateUpdated": "2026-09-02T18:03:05.010Z"}, "containers": {"cna": {"title": "HTTPX2: Streaming response decompression does not bound peak memory (decompression amplification)", "problemTypes": [{"descriptions": [{"cweId": "CWE-409", "lang": "en", "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/pydantic/httpx2/security/advisories/GHSA-8xx6-hgc6-gc2m", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/pydantic/httpx2/security/advisories/GHSA-8xx6-hgc6-gc2m"}, {"name": "https://github.com/pydantic/httpx2/pull/1126", "tags": ["x_refsource_MISC"], "url": "https://github.com/pydantic/httpx2/pull/1126"}, {"name": "https://github.com/pydantic/httpx2/commit/4fd0c70a3f207c618b145934792f791bccfb39f8", "tags": ["x_refsource_MISC"], "url": "https://github.com/pydantic/httpx2/commit/4fd0c70a3f207c618b145934792f791bccfb39f8"}, {"name": "https://github.com/pydantic/httpx2/releases/tag/v2.12.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/pydantic/httpx2/releases/tag/v2.12.0"}], "affected": [{"vendor": "pydantic", "product": "httpx2", "versions": [{"version": "< 2.12.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-02T18:03:05.010Z"}, "descriptions": [{"lang": "en", "value": "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": {"advisory": "GHSA-8xx6-hgc6-gc2m", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "httpx2", "vendor": "pydantic", "versions": [{"status": "affected", "version": "< 2.12.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-84382", "lastModified": "2026-09-02T19:18:08.353", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-02T19:18:08.353", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/pydantic/httpx2/commit/4fd0c70a3f207c618b145934792f791bccfb39f8"}, {"source": "security-advisories@github.com", "url": "https://github.com/pydantic/httpx2/pull/1126"}, {"source": "security-advisories@github.com", "url": "https://github.com/pydantic/httpx2/releases/tag/v2.12.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/pydantic/httpx2/security/advisories/GHSA-8xx6-hgc6-gc2m"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-409"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "httpx2: HTTPX2: Denial of Service via streaming response decompression memory amplification", "id": "2527702", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2527702"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-409", "details": ["A flaw was found in httpx2, a Python HTTP client. The content decoders in httpx2 fully inflate compressed network chunks (such as gzip, deflate, br, or zstd) before yielding bounded pieces to the application. This can lead to a small compressed chunk expanding significantly in memory, for example, a 64 KiB chunk expanding to approximately 64 MiB. A remote attacker, by controlling or compromising a server, could exploit this vulnerability to cause severe memory pressure or out-of-memory process termination, leading to a Denial of Service (DoS) for applications using httpx2."], "name": "CVE-2026-84382", "package_state": [{"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Affected", "package_name": "lightspeed-core/lightspeed-stack-rhel9", "product_name": "Lightspeed Core"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-automl-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-kserve-autogluon-server-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Affected", "package_name": "rhoai/odh-kserve-storage-initializer-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}], "public_date": "2026-09-02T18:03:05Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-84382\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-84382\nhttps://github.com/pydantic/httpx2/commit/4fd0c70a3f207c618b145934792f791bccfb39f8\nhttps://github.com/pydantic/httpx2/pull/1126\nhttps://github.com/pydantic/httpx2/releases/tag/v2.12.0\nhttps://github.com/pydantic/httpx2/security/advisories/GHSA-8xx6-hgc6-gc2m"], "threat_severity": "Important"}

{"created": "2026-09-03T10:30:12.535950+00:00", "updated": "2026-09-03T10:30:12.535956+00:00", "vendors": []}