Detections
Analytics

Echo: nltk: security update to 3.9.4

high Tenable Cloud Security Plugin ID 457276

Description

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

 - NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local
 attackers to read arbitrary files outside the corpus root. The vulnerability exists because path
 validation is lexical and does not account for symlink resolution, enabling attackers to place symlinks
 inside the corpus root to access files outside the intended boundary. (CVE-2026-70626)

Solution

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

See Also

https://advisory.echohq.com/cve/CVE-2026-70626

Plugin Details

Severity: High

ID: 457276

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: Low

Score: 3

Percentile: 23.61

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.8

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

CVSS Score Source: CVE-2026-70626

CVSS v3

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 5.6

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

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

CVSS v4

Risk Factor: High

Base Score: 8.6

Threat Score: 7.3

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/9/2026

Vulnerability Publication Date: 8/22/2026

Reference Information

CVE: CVE-2026-70626