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CVE-2025-58068

CRITICAL

9.1

Description

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.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published8/29/2025

Last Modified11/3/2025

Sourcenvd

Honeypot Sightings0

Affected Products

eventlet:eventlet

Weaknesses (CWE)

CWE-444

References

https://github.com/eventlet/eventlet/commit/0bfebd1117d392559e25b4bfbfcc941754de88fb(security-advisories@github.com)

https://github.com/eventlet/eventlet/pull/1062(security-advisories@github.com)

https://github.com/eventlet/eventlet/security/advisories/GHSA-hw6f-rjfj-j7j7(security-advisories@github.com)

https://lists.debian.org/debian-lts-announce/2025/09/msg00003.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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