Detections
Analytics

Echo: nltk: security update to 3.9.4

high Tenable Cloud Security Plugin ID 458661

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, the NLTK
 downloader does not validate the `subdir` and `id` attributes when processing remote XML index files.
 Attackers can control a remote XML index server to provide malicious values containing path traversal
 sequences (such as `../`), which can lead to arbitrary directory creation, arbitrary file creation, and
 arbitrary file overwrite. Commit 89fe2ec2c6bae6e2e7a46dad65cc34231976ed8a patches the issue.
 (CVE-2026-33236)

Solution

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

See Also

https://advisory.echohq.com/cve/CVE-2026-33236

Plugin Details

Severity: High

ID: 458661

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.64

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-33236

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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-2026-33236