Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 24.3%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-44545
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cpe:2.3:a:djangoproject:daphne:0.10.0
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cpe:2.3:a:djangoproject:daphne:0.10.1
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cpe:2.3:a:djangoproject:daphne:0.10.2
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cpe:2.3:a:djangoproject:daphne:0.10.3
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cpe:2.3:a:djangoproject:daphne:0.11.0
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cpe:2.3:a:djangoproject:daphne:0.11.1
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cpe:2.3:a:djangoproject:daphne:0.11.2
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cpe:2.3:a:djangoproject:daphne:0.11.3
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cpe:2.3:a:djangoproject:daphne:0.11.4
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cpe:2.3:a:djangoproject:daphne:0.12.0
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cpe:2.3:a:djangoproject:daphne:0.12.1
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cpe:2.3:a:djangoproject:daphne:0.12.2
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cpe:2.3:a:djangoproject:daphne:0.13.0
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cpe:2.3:a:djangoproject:daphne:0.13.1
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cpe:2.3:a:djangoproject:daphne:0.14.0
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cpe:2.3:a:djangoproject:daphne:0.14.1
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cpe:2.3:a:djangoproject:daphne:0.14.2
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cpe:2.3:a:djangoproject:daphne:0.14.3
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cpe:2.3:a:djangoproject:daphne:0.15.0
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cpe:2.3:a:djangoproject:daphne:0.8
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cpe:2.3:a:djangoproject:daphne:0.8.1
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cpe:2.3:a:djangoproject:daphne:0.8.2
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cpe:2.3:a:djangoproject:daphne:0.9
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cpe:2.3:a:djangoproject:daphne:0.9.3
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cpe:2.3:a:djangoproject:daphne:1.0.0
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cpe:2.3:a:djangoproject:daphne:1.0.1
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cpe:2.3:a:djangoproject:daphne:1.0.2
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cpe:2.3:a:djangoproject:daphne:1.0.3
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cpe:2.3:a:djangoproject:daphne:1.1.0
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cpe:2.3:a:djangoproject:daphne:1.2.0
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cpe:2.3:a:djangoproject:daphne:1.3.0
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cpe:2.3:a:djangoproject:daphne:1.4.0
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cpe:2.3:a:djangoproject:daphne:1.4.1
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cpe:2.3:a:djangoproject:daphne:1.4.2
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cpe:2.3:a:djangoproject:daphne:2.0.0
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cpe:2.3:a:djangoproject:daphne:2.0.1
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cpe:2.3:a:djangoproject:daphne:2.0.2
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cpe:2.3:a:djangoproject:daphne:2.0.3
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cpe:2.3:a:djangoproject:daphne:2.0.4
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cpe:2.3:a:djangoproject:daphne:2.1.0
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cpe:2.3:a:djangoproject:daphne:2.1.1
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cpe:2.3:a:djangoproject:daphne:2.1.2
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cpe:2.3:a:djangoproject:daphne:2.2.0
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cpe:2.3:a:djangoproject:daphne:2.2.1
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cpe:2.3:a:djangoproject:daphne:2.2.2
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cpe:2.3:a:djangoproject:daphne:2.2.3
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cpe:2.3:a:djangoproject:daphne:2.2.4
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cpe:2.3:a:djangoproject:daphne:2.2.5
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cpe:2.3:a:djangoproject:daphne:2.3.0
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cpe:2.3:a:djangoproject:daphne:2.4.0
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cpe:2.3:a:djangoproject:daphne:2.4.1
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cpe:2.3:a:djangoproject:daphne:2.5.0
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cpe:2.3:a:djangoproject:daphne:3.0.0
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cpe:2.3:a:djangoproject:daphne:3.0.1
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cpe:2.3:a:djangoproject:daphne:3.0.2
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cpe:2.3:a:djangoproject:daphne:4.0.0
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cpe:2.3:a:djangoproject:daphne:4.1.0
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cpe:2.3:a:djangoproject:daphne:4.1.1
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cpe:2.3:a:djangoproject:daphne:4.1.2
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cpe:2.3:a:djangoproject:daphne:4.2.0
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cpe:2.3:a:djangoproject:daphne:4.2.1