PT-2026-45941 · Djangoproject · Daphne

Carlton Gibson + 1 · Published 2026-06-03 · Updated 2026-06-03 · CVE-2026-44546

NVD

CVSS v3.1

3.7

Low

Base vector

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

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.

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2026-44546

Affected Products

Daphne

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-44546 · Security Note
• https://github.com/django/daphne/blob/main/CHANGELOG.txt · Note