> CVE-2025-57804

« BACK_TO_HOME
PUBLISHED
2025-08-25 21:15
MODIFIED
2025-08-26 13:41
EPSS (Prob. Exploit)
1.88%
Top 20.4%
DATA SOURCES:
NVD 🔗 2025-10-18 RED HAT 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-10-28 OSV 🔗 2026-11-08

> DESCRIPTION

h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters into headers. This occurs when servers downgrade HTTP/2 requests to HTTP/1.1 without properly validating header names/values, enabling attackers to manipulate request boundaries and bypass security controls. This issue has been patched in version 4.3.0.

> AFFECTED_PRODUCTS

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

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> GITHUB SECURITY ADVISORY

GHSA-847f-9342-265h MODERATE

h2 allows HTTP Request Smuggling due to illegal characters in headers

AFFECTED PACKAGES:
PIP / h2
< 4.3.0
Fixed in: 4.3.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

h2 allows HTTP Request Smuggling due to illegal characters in headers

AFFECTED PACKAGES:
Unknown / Unknown
17 versions affected
ALIASES:
GHSA-847f-9342-265h, PYSEC-2026-1435

> HISTORIQUE DES MODIFICATIONS

Première apparition
25/08/2025 21:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 15:07
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
📊 ENRICHISSEMENT 18/10/2025 12:08
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
📊 ENRICHISSEMENT 18/10/2025 12:08
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 1 year ago
« BACK_TO_HOME