IT-Sentinel

« BACK_TO_HOME

PUBLISHED

2026-08-06 22:18

MODIFIED

2026-08-06 22:18

CVSS_SCORE V3

5.3

EPSS (Prob. Exploit)

0.42%

Top 64.9%

DATA SOURCES:

NVD 🔗 2026-08-06 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-08-13

> DESCRIPTION

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Versions up to and including 4.4.0 accept request header blocks containing more than one Host header, and forward every Host header to the consuming application. Where the consumer downgrades HTTP/2 to HTTP/1.1, the resulting request carries two Host header lines, providing a request smuggling primitive. This issue is fixed in version 4.4.1.

> 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:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EXPLOITABILITY

3.9

IMPACT

1.4

> MÉTRIQUES CVSS DÉTAILLÉES

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

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	Low (L)	Peu de conditions requises 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	None (N)	Aucune divulgation d'informations
I (Impact Intégrité) Integrity Impact	None (N)	Aucune modification de données possible
A (Impact Disponibilité) Availability Impact	Low (L)	Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité

None

Aucune divulgation d'informations

Intégrité

None

Aucune modification de données possible

Disponibilité

Low

Interruption partielle du service possible

> 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.

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

h2: Duplicate Host header could facilitate request smuggling

AFFECTED PACKAGES:

Unknown / Unknown

19 versions affected

ALIASES:

GHSA-6hr6-w5qg-qmwg, PYSEC-2026-3628

> HISTORIQUE DES MODIFICATIONS

Première apparition

06/08/2026 22:18

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 01/09/2026 06:02

CWE