Detections
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Echo: nltk: security update to 3.9.3

high Tenable Cloud Security Plugin ID 465336

Description

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

 - A vulnerability in NLTK versions up to and including 3.9.2 allows arbitrary file read via path traversal
 in multiple CorpusReader classes, including WordListCorpusReader, TaggedCorpusReader, and
 BracketParseCorpusReader. These classes fail to properly sanitize or validate file paths, enabling
 attackers to traverse directories and access sensitive files on the server. This issue is particularly
 critical in scenarios where user-controlled file inputs are processed, such as in machine learning APIs,
 chatbots, or NLP pipelines. Exploitation of this vulnerability can lead to unauthorized access to
 sensitive files, including system files, SSH private keys, and API tokens, and may potentially escalate to
 remote code execution when combined with other vulnerabilities. (CVE-2026-0847)

Solution

Update the nltk library and its related packages to version 3.9.3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-0847

Plugin Details

Severity: High

ID: 465336

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

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:C/I:N/A:N

CVSS Score Source: CVE-2026-0847

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:H/I:N/A:N

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/9/2026

Vulnerability Publication Date: 3/4/2026

Reference Information

CVE: CVE-2026-0847