CVE-2026-44546

3.7 LOW 0.2% exploit odds No fix listed Other Library

What it is

daphne before 4.2.2 reconstructs a raw HTTP request from Twisted's parsed headers and feeds it to autobahn for WebSocket handshake processing. Twisted does not treat \x0b, \x0c, \x1c, \x1d, \x1e, or \x85 as header line separators, but autobahn decodes header values to str and calls splitlines(). An attacker can exploit this parser differential to inject additional headers into the ASGI scope passed to the application. daphne now rejects requests with these bytes in any header value with a 400 response.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 0.2% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-06-03 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-07-22 19:10 UTC Last updatedMost recent change to the record

Details

Published: 2026-06-03 14:16 UTC
Last modified: 2026-07-22 19:10 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-444
Record status: Analyzed

Affected

Djangoproject Daphne < 4.2.2

Attack profile CVSS 3.1 · 3.7

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

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References

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

NVD record · CVE.org record