Detections
Analytics

Echo: nltk: security update to 3.9.4

high Tenable Cloud Security Plugin ID 455227

Description

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

 - NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials
 supporting research and development in Natural Language Processing. In versions 3.9.3 and prior,
 `nltk.app.wordnet_app` allows unauthenticated remote shutdown of the local WordNet Browser HTTP server
 when it is started in its default mode. A simple `GET /SHUTDOWN%20THE%20SERVER` request causes the process
 to terminate immediately via `os._exit(0)`, resulting in a denial of service. Commit
 bbaae83db86a0f49e00f5b0db44a7254c268de9b patches the issue. (CVE-2026-33231)

Solution

Update the nltk library and its related packages to version 3.9.4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-33231

Plugin Details

Severity: High

ID: 455227

Version: Revision 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-33231

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/7/2026

Vulnerability Publication Date: 3/19/2026

Reference Information

CVE: CVE-2026-33231