CVE-2026-44545

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.

Score

CVSS 3.1 7.5 High

Status

Analyzed - 6a34fbeb-21d4-45e7-8e0a-62b95bc12c92

Published

2026-06-03

Last modified

2026-06-03

Weaknesses

CWE-770

Affected products

• Daphne (Djangoproject)

References

• https://github.com/django/daphne/blob/main/CHANGELOG.txt