{"id":"DEBIAN-CVE-2026-69243","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2.","modified":"2026-09-20T22:00:07.074523973Z","published":"2026-08-03T21:16:42.113Z","upstream":["CVE-2026-69243"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-69243"}],"affected":[{"package":{"name":"python-aiohttp","ecosystem":"Debian:12","purl":"pkg:deb/debian/python-aiohttp?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.10.0-1","3.10.1-1","3.10.10-1","3.10.10-2","3.10.11-1","3.10.3-1","3.10.3-2","3.10.3-3","3.10.4-1","3.10.5-1","3.10.6-1","3.10.8-1","3.11.15-1","3.11.16-1","3.12.15-1","3.13.0-1","3.13.1-1","3.13.3-1","3.13.3-2","3.13.3-3","3.13.5-1","3.14.0-1","3.14.1-1","3.14.1-2","3.14.1-3","3.14.1-4","3.14.1-5","3.14.3-1","3.8.4-1","3.8.4-1+deb12u1","3.8.5-1","3.8.6-1","3.9.1-1","3.9.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69243.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Debian:13","purl":"pkg:deb/debian/python-aiohttp?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11.16-1","3.11.16-1+deb13u1","3.12.15-1","3.13.0-1","3.13.1-1","3.13.3-1","3.13.3-2","3.13.3-3","3.13.5-1","3.14.0-1","3.14.1-1","3.14.1-2","3.14.1-3","3.14.1-4","3.14.1-5","3.14.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69243.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Debian:14","purl":"pkg:deb/debian/python-aiohttp?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.3-1"}]}],"versions":["3.11.16-1","3.12.15-1","3.13.0-1","3.13.1-1","3.13.3-1","3.13.3-2","3.13.3-3","3.13.5-1","3.14.0-1","3.14.1-1","3.14.1-2","3.14.1-3","3.14.1-4","3.14.1-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69243.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}