Detections
Analytics

Echo: nltk: security update to 3.10.3

medium Tenable Self-Hosted Container Security Plugin ID 463948

Description

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

 - NLTK versions before 3.10.3 contain a quadratic CPU exhaustion vulnerability in
 XMLCorpusView._read_xml_fragment() that rescans accumulated XML fragments on every 1 KiB block read.
 Attackers can provide malformed XML corpus files to cause severe CPU consumption and denial of service
 through affected readers like BNCCorpusReader. (CVE-2026-81723)

Solution

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

See Also

https://advisory.echohq.com/cve/CVE-2026-81723

Plugin Details

Severity: Medium

ID: 463948

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: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 1.9

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

CVSS Score Source: CVE-2026-81723

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/3/2026

Vulnerability Publication Date: 8/27/2026

Reference Information

CVE: CVE-2026-81723