CVE-2026-44545
MEDIUMUnbounded WebSocket message and frame sizes can cause unauthenticated remote denial of service
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Release Notes release-notes
https://github.com/django/daphne/blob/main/CHANGELOG.txt
Scores
CVSS v3
5.3
EPSS
0.0030
EPSS Percentile
21.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (3)
djangoproject/daphne
< 4.2.2
djangoproject/daphne
4.2.0 - 4.2.1
djangoproject/daphne
4.2.2
Published
Jun 03, 2026
Tracked Since
Jun 03, 2026