Eventlet affected by HTTP request smuggling in unparsed trailers

緊急 9.1CVE-2025-58068 · GHSA-hw6f-rjfj-j7j7 · PYSEC-2026-1350 · 29/08/2025 公開 · 19/10/2026 更新

要点

CVE-2025-58068 は eventlet, eventlet (eventlet) に影響する深刻度「緊急」 (CVSS 9.1) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.42%（全脆弱性の 36.3% より高い）。
対処：0.40.3 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
eventlet PyPI	`< 0.40.3`	`0.40.3`
eventlet eventlet	`< 0.40.3`	`0.40.3`

概要

Impact

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
Poison web caches

Patches

Problem has been patched in eventlet 0.40.3.

The patch just drops trailers. If a backend behind eventlet.wsgi proxy requires trailers, then this patch BREAKS your setup.

Workarounds

Do not use eventlet.wsgi facing untrusted clients.

References

Patch https://github.com/eventlet/eventlet/pull/1062
This issue is similar to https://github.com/advisories/GHSA-9548-qrrj-x5pj

NVD の説明

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.