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PUBLISHED

2026-06-03 14:16

MODIFIED

2026-06-03 14:16

CVSS_SCORE V3

3.7

EPSS (Prob. Exploit)

0.29%

Top 79.7%

DATA SOURCES:

NVD 🔗 2026-06-03 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-05 OSV 🔗 2026-07-26

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR

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

EXPLOITABILITY

2.2

IMPACT

1.4

> MÉTRIQUES CVSS DÉTAILLÉES

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

Métrique	Valeur	Interprétation
AV (Vecteur d'Attaque) Attack Vector	Network (N)	Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque) Attack Complexity	High (H)	Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis) Privileges Required	None (N)	Aucune authentification requise
UI (Interaction Utilisateur) User Interaction	None (N)	Aucune interaction utilisateur nécessaire
S (Périmètre) Scope	Unchanged (U)	Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité) Confidentiality Impact	Low (L)	Divulgation limitée d'informations
I (Impact Intégrité) Integrity Impact	None (N)	Aucune modification de données possible
A (Impact Disponibilité) Availability Impact	None (N)	Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité

Low

Divulgation limitée d'informations

Intégrité

None

Aucune modification de données possible

Disponibilité

None

Aucune interruption de service

> WEAKNESSES

CWE-444

> CWE DETAILED DESCRIPTIONS

CWE-444: Inconsistent Interpretation of HTTP Requests - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

> GITHUB SECURITY ADVISORY

GHSA-xh68-hfp5-5x5m LOW

daphne: WebSocket handshake header smuggling through autobahn splitlines() mishandling of non-standard line separators

AFFECTED PACKAGES:

PIP / daphne

< 4.2.2

Fixed in: 4.2.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Header injection via WebSocket upgrade parser differential allows ASGI scope header spoofing

AFFECTED PACKAGES:

Unknown / Unknown

2 versions affected

ALIASES:

GHSA-xh68-hfp5-5x5m, PYSEC-2026-214

> HISTORIQUE DES MODIFICATIONS

Première apparition

03/06/2026 14:16

Source: NVD

📊 ENRICHISSEMENT 01/11/2026 06:59

CWE

Champ modifié: Description CWE

Ancienne valeur:

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow betwe...

Nouvelle valeur:

CWE-444: Inconsistent Interpretation of HTTP Requests - The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a c...

📊 ENRICHISSEMENT 01/07/2026 06:01

CWE