{"id":"PYSEC-2026-213","details":"daphne before 4.2.2 did not pass maxFramePayloadSize or maxMessagePayloadSize to Autobahn's WebSocketServerFactory. Because Autobahn defaults both values to 0 (unlimited), an unauthenticated remote attacker could send arbitrarily large WebSocket messages or frames, causing excessive memory consumption and a denial of service.","aliases":["CVE-2026-44545"],"modified":"2026-06-16T16:15:05.251354229Z","published":"2026-06-03T14:16:43.583Z","references":[{"type":"ADVISORY","url":"https://github.com/django/daphne/blob/main/CHANGELOG.txt"}],"affected":[{"package":{"name":"daphne","ecosystem":"PyPI","purl":"pkg:pypi/daphne"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.2"}]}],"versions":["0.10.0","0.10.1","0.10.2","0.10.3","0.11.0","0.11.1","0.11.2","0.11.3","0.12.0","0.12.1","0.12.2","0.13.0","0.13.1","0.14.0","0.14.1","0.14.2","0.14.3","0.15.0","0.8.1","0.8.2","0.9","0.9.1","0.9.2","0.9.3","1.0.0","1.0.1","1.0.2","1.0.3","1.1.0","1.2.0","1.3.0","1.4.0","1.4.1","1.4.2","2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.1.0","2.1.1","2.1.2","2.2.0","2.2.1","2.2.2","2.2.3","2.2.4","2.2.5","2.3.0","2.4.0","2.4.1","2.5.0","3.0.0","3.0.1","3.0.2","4.0.0","4.0.0b1","4.1.0","4.1.1","4.1.2","4.2.0","4.2.1"],"ecosystem_specific":{},"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/daphne/PYSEC-2026-213.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}