CVE-2025-58068

Eventlet is a concurrent networking library for Python. Prior to version 0.40.3, the Eventlet WSGI parser is vulnerable to HTTP Request Smuggling due to improper handling of HTTP trailer sections. This vulnerability could enable attackers to, bypass front-end security controls, launch targeted attacks against active site users, and poison web caches. This problem has been patched in Eventlet 0.40.3 by dropping trailers which is a breaking change if a backend behind eventlet.wsgi proxy requires trailers. A workaround involves not using eventlet.wsgi facing untrusted clients.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/eventlet/eventlet/commit/0bfebd1117d392559e25b4bfbfcc941754de88fb	Patch
https://github.com/eventlet/eventlet/pull/1062	Issue Tracking
https://github.com/eventlet/eventlet/security/advisories/GHSA-hw6f-rjfj-j7j7	Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/09/msg00003.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:eventlet:eventlet:*:*:*:*:*:*:*:*

History

19 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Eventlet es una biblioteca de red concurrente para Python. Antes de la versión 0.40.3, el analizador WSGI de Eventlet es vulnerable a Contrabando de Solicitudes HTTP debido a un manejo inadecuado de las secciones de tráiler HTTP. Esta vulnerabilidad podría permitir a los atacantes eludir los controles de seguridad de front-end, lanzar ataques dirigidos contra usuarios activos del sitio y envenenar las cachés web. Este problema ha sido parcheado en Eventlet 0.40.3 eliminando los tráilers, lo cual es un cambio disruptivo si un backend detrás de un proxy eventlet.wsgi requiere tráilers. Una solución alternativa implica no usar eventlet.wsgi frente a clientes no confiables.

Information

Published : 2025-08-29 22:15

Updated : 2026-10-19 17:10

NVD link : CVE-2025-58068

Mitre link : CVE-2025-58068

CVE.ORG link : CVE-2025-58068

JSON object : View

Products Affected

eventlet

eventlet

CWE

CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

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