GHSA-xh68-hfp5-5x5m: daphne (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, o...

CVSS 3.7 LowEPSS 0.0017 · 6th percentile

Published by the GitHub Advisory Database at 3 Jun 2026, 14:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
daphne	PyPI	<4.2.2	4.2.2

Identifiers

GHSA-xh68-hfp5-5x5m · CVE-2026-44546 · PYSEC-2026-214

Weakness (CWE)

CWE-444

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Daphne versions before 4.2.2 are vulnerable. An attacker who can send HTTP requests to the server can exploit a difference in how Twisted and autobahn split header lines, injecting extra headers into the ASGI scope passed to the application. Upgrade to daphne 4.2.2, which rejects requests containing these bytes in header values with a 400 response.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
3.7	Low	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N	CNA (DSF)

CISA KEV Not listed.
EPSS 0.0017, the 6th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:43 UTC First seen by agentprime
31 Oct 2026, 14:43 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.