{"id":"CVE-2026-69244","state":"PUBLISHED","title":"AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)","description":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3.","publishedAt":"2026-08-03T20:50:59.538Z","updatedAt":"2026-08-04T14:13:17.355Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["aio-libs aiohttp"],"affected":[{"vendor":"aio-libs","product":"aiohttp","versions":[{"version":"< 3.14.3","status":"affected"}]}],"references":["https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273","https://github.com/aio-libs/aiohttp/pull/13223","https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d","https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3"],"weaknesses":["CWE-400","CWE-416","CWE-125"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/69xxx/CVE-2026-69244.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-69244","state":"PUBLISHED","datePublished":"2026-08-03T20:50:59.538Z","dateUpdated":"2026-08-04T14:13:17.355Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-03T19:54:19.852Z"},"containers":{"cna":{"title":"AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)","descriptions":[{"lang":"en","value":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3."}],"affected":[{"vendor":"aio-libs","product":"aiohttp","versions":[{"version":"< 3.14.3","status":"affected"}]}],"references":[{"url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273","name":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/aio-libs/aiohttp/pull/13223","name":"https://github.com/aio-libs/aiohttp/pull/13223","tags":["x_refsource_MISC"]},{"url":"https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d","name":"https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d","tags":["x_refsource_MISC"]},{"url":"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3","name":"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416: Use After Free","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-03T20:50:59.538Z"},"source":{"advisory":"GHSA-cq5v-8q36-5273","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-04T14:13:09.710726Z","id":"CVE-2026-69244","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-04T14:13:17.355Z"}}]}}}