{"id":"AZL-65256","summary":"CVE-2025-53643 affecting package python-aiohttp 3.6.2-3","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":"2026-04-01T05:20:30.597517Z","published":"2025-07-14T21:15:27Z","upstream":["CVE-2025-53643"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53643"}],"affected":[{"package":{"name":"python-aiohttp","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/python-aiohttp"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.6.2-3"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-65256.json"}}],"schema_version":"1.7.5"}