Detections
Analytics

Echo: nltk: security update to 3.9.3

medium Tenable Self-Hosted Container Security Plugin ID 462370

Description

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

 - In nltk version 3.9.4, the `nltk.downloader.Downloader._download_package()` function writes downloaded
 package bytes to disk and may extract them before enforcing SHA-256 or MD5 checksum validation. This
 allows an attacker to tamper with the package response body for `info.url` through a compromised mirror,
 malicious proxy, or other source-substitution condition, leading to the installation of attacker-
 controlled package bytes. The vulnerability can result in malicious corpus or model content being trusted
 by downstream users or applications. (CVE-2026-12259)

Solution

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

See Also

https://advisory.echohq.com/cve/CVE-2026-12259

Plugin Details

Severity: Medium

ID: 462370

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2026-12259

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/9/2026

Vulnerability Publication Date: 8/3/2026

Reference Information

CVE: CVE-2026-12259