{"id":"DEBIAN-CVE-2025-53643","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.12.14, the Python parser is vulnerable to a request smuggling vulnerability due to not parsing trailer sections of an HTTP request. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.12.14 contains a patch for this issue.","modified":"2026-09-01T16:06:19.280025696Z","published":"2025-07-14T21:15:27.827Z","upstream":["CVE-2025-53643"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-53643"}],"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","3.8.4-1","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-2025-53643.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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-53643.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":"3.12.15-1"}]}],"versions":["3.11.16-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-53643.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}