{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123817", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-11-06T15:27:56.227Z", "datePublished": "2026-11-09T21:17:58.409Z", "dateUpdated": "2026-11-09T21:17:58.409Z"}, "containers": {"cna": {"title": "AIOHTTP WebSocket frame reassembly permits excessive memory consumption from tiny reads", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2g87-pp6c-29x5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2g87-pp6c-29x5"}, {"name": "https://github.com/aio-libs/aiohttp/pull/13352", "tags": ["x_refsource_MISC"], "url": "https://github.com/aio-libs/aiohttp/pull/13352"}, {"name": "https://github.com/aio-libs/aiohttp/pull/13612", "tags": ["x_refsource_MISC"], "url": "https://github.com/aio-libs/aiohttp/pull/13612"}, {"name": "https://github.com/aio-libs/aiohttp/commit/09bcaa73ff084a0c539bbf16a0a78743acb7141f", "tags": ["x_refsource_MISC"], "url": "https://github.com/aio-libs/aiohttp/commit/09bcaa73ff084a0c539bbf16a0a78743acb7141f"}, {"name": "https://github.com/aio-libs/aiohttp/commit/6a4f6682817839313b04b8e5cea2b39c1a88ab4f", "tags": ["x_refsource_MISC"], "url": "https://github.com/aio-libs/aiohttp/commit/6a4f6682817839313b04b8e5cea2b39c1a88ab4f"}, {"name": "https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4"}], "affected": [{"vendor": "aio-libs", "product": "aiohttp", "versions": [{"version": "< 3.14.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-11-09T21:17:58.409Z"}, "descriptions": [{"lang": "en", "value": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the WebSocket reader retains one bytes object for each transport read while reassembling an incomplete frame. A malicious peer can split a frame into many tiny reads so per-object overhead substantially exceeds the payload bytes allowed by max_msg_size. The condition affects a server receiving frames from a malicious client and a client receiving frames from a malicious server, and can cause excessive memory consumption or denial of service. This issue is fixed in version 3.14.4."}], "source": {"advisory": "GHSA-2g87-pp6c-29x5", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.14.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "aiohttp", "source": "cna", "vendor": "aio-libs"}, "product": "aiohttp", "vendor": "aio-libs"}], "created": "2026-11-09T22:15:15.240627+00:00", "updated": "2026-11-09T22:15:15.240648+00:00", "vendors": ["aio-libs", "aio-libs$PRODUCT$aiohttp"]}