CVE-2026-44545
5.3
MEDIUM
CVSS 3.1
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.
How to fix CVE-2026-44545
To remediate CVE-2026-44545, upgrade the affected package to a fixed version below.
- Debian/python-daphne—no fix listed
- PyPI/daphne—upgrade to 4.2.2 or later
Is CVE-2026-44545 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-44545.
Affected packages (2)
- from 0
- from 0, < 4.2.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |