What’s Vulnerable › Vulnerabilities
CVE-2026-44545: Unbounded WebSocket message and frame sizes can cause unauthenticated remote denial of service
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-03 · updated 2026-07-22
- Weakness: CWE-770
Description
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.
Affected products
- djangoproject daphne: before 4.2.2 — fixed in 4.2.2
How to fix
Upgrade to a fixed version: djangoproject daphne 4.2.2. Check the vendor advisory for mitigations.
References
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