CVE-2026-44546

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.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/django/daphne/blob/main/CHANGELOG.txt	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:djangoproject:daphne:*:*:*:*:*:*:*:*

History

15 Jun 2026, 19:52

Type	Values Removed	Values Added
CPE		cpe:2.3:a:djangoproject:daphne::::::::
First Time		Djangoproject daphne Djangoproject
References	~~() https://github.com/django/daphne/blob/main/CHANGELOG.txt -~~	() https://github.com/django/daphne/blob/main/CHANGELOG.txt - Release Notes

03 Jun 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-03 14:16

Updated : 2026-06-17 10:50

NVD link : CVE-2026-44546

Mitre link : CVE-2026-44546

CVE.ORG link : CVE-2026-44546

JSON object : View

Products Affected

djangoproject

daphne

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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