{"id":"AZL-111733","summary":"CVE-2026-115927 affecting package python-tornado 6.3.3-11","details":"Tornado is a Python web framework and asynchronous networking library. Prior to 6.6.0, Tornado decodes HTTP/1.1 chunked transfer encoding by processing body data that has already arrived without yielding to the event loop. A remote unauthenticated peer can send millions of one-byte chunks to monopolize the process event loop and stall every other connection served by that process, while lowering max_body_size only limits the duration of each request. For handlers that do not use @stream_request_body, retaining each chunk as a separate object can consume roughly twenty times the received body size, and SimpleAsyncHTTPClient has the same event-loop behavior when reading a response from a malicious server. This issue is fixed in version 6.6.0.","modified":"2026-11-01T05:30:16Z","published":"2026-10-26T20:17:52Z","upstream":["CVE-2026-115927"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115927"}],"affected":[{"package":{"name":"python-tornado","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/python-tornado"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.3.3-11"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-111733.json"}}],"schema_version":"1.9.2"}