Detections
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Echo: nltk: security update to 3.10.3

medium Tenable Self-Hosted Container Security Plugin ID 462521

Description

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

 - NLTK versions before 3.10.3 contain a filesystem containment bypass vulnerability in the
 Downloader.download and Downloader.incr_download methods that allows attackers to overwrite files outside
 the install root through pre-existing hardlinks. Attackers with write access to a shared downloader
 directory can create hardlinks pointing to outside-root files that are then overwritten during normal
 package extraction, mutating files outside the intended install tree. (CVE-2026-81727)

Solution

Update the nltk library and its related packages to version 3.10.3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-81727

Plugin Details

Severity: Medium

ID: 462521

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: Medium

Score: 4.3

Percentile: 53.43

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.9

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

CVSS Score Source: CVE-2026-81727

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 5.4

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/3/2026

Vulnerability Publication Date: 8/27/2026

Reference Information

CVE: CVE-2026-81727