Detections
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Echo: eventlet: security update to 0.40.3

medium Tenable Cloud Security Plugin ID 455154

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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-2025-58068)

Solution

Update the eventlet library and its related packages to version 0.40.3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-58068

Plugin Details

Severity: Medium

ID: 455154

Version: Revision 1.2

Type: Local

Published: 10/1/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.37

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2025-58068

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/12/2026

Vulnerability Publication Date: 8/29/2025

Reference Information

CVE: CVE-2025-58068