{"id":"CVE-2026-111064","title":"aiohttp server lacks an initial request/header timeout","summary":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, keepalive timeout handling is absent during the initial portion of a request. An attacker can keep an idle connection open indefinitely befo…","severity":"high","cvss":8.2,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-770","CWE-772"],"vendor":"aio-libs","product":"aiohttp","affected":["aiohttp < 3.14.4"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-28T15:29:16.694430Z"},"published":"2026-10-19","updated":"2026-10-28","sourceUpdated":"2026-10-28T15:29:24.279Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111064","references":[{"url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-5wr8-gcqf-gqf3","label":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-5wr8-gcqf-gqf3"},{"url":"https://github.com/aio-libs/aiohttp/commit/be846822b4b3a5a54b6163e794b42dc06fba54a3","label":"https://github.com/aio-libs/aiohttp/commit/be846822b4b3a5a54b6163e794b42dc06fba54a3"},{"url":"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4","label":"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111064.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-111064"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555713"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-111064"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111064"},{"url":"https://github.com/aio-libs/aiohttp"},{"url":"https://github.com/advisories/GHSA-5wr8-gcqf-gqf3"}],"tags":["cve.org","csaf","vex","red-hat","osv","pip","ghsa"],"epss":0.00399,"epssPercentile":0.34049,"aliases":["GHSA-5wr8-gcqf-gqf3"],"ecosystem":"pip","patched":["aiohttp 3.14.4"],"scores":{"cna":8.2,"vendor":7.5},"ingestedAt":"2026-10-19T17:33:42.441Z","slug":"CVE-2026-111064","body":"## Overview\n\nAIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, keepalive timeout handling is absent during the initial portion of a request. An attacker can keep an idle connection open indefinitely before sending any request data, consuming server connection capacity. This issue is fixed in version 3.14.4.\n\n## Affected\n\n- `aiohttp < 3.14.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-111064)\n\nAffected packages:\n\n- `aiohttp < 3.14.4`\n\nPatched in:\n\n- `aiohttp 3.14.4`\n\nSource: https://osv.dev/vulnerability/GHSA-5wr8-gcqf-gqf3\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Exploit Intelligence, Lightspeed Core, Migration Toolkit for Applications 8, OpenShift Lightspeed, Red Hat AI Inference Server, Red Hat Ansible Automation Platform 2, … · no fix planned: Exploit Intelligence, Lightspeed Core, Migration Toolkit for Applications 8, OpenShift Lightspeed, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111064.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":230709,"id":"CVE-2026-111064","ts":1793204066686,"field":"cvss","old":"7.5","new":"8.2"},{"seq":226999,"id":"CVE-2026-111064","ts":1792584974841,"field":"cvss","old":"8.2","new":"7.5"}]}