Detections
Analytics

Echo: nltk: security update to 3.10.0

critical Tenable Cloud Security Plugin ID 459929

Description

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

 - NLTK before 3.10.0 (affected versions <=3.9.4) contains an unsafe pickle deserialization vulnerability in
 the TransitionParser.parse() method (nltk/parse/transitionparser.py). The method calls pickle_load() with
 the default restricted=False, routing deserialization through WarningUnpickler, which does not override
 find_class() and therefore permits arbitrary class resolution. When an application loads an attacker-
 crafted model file, embedded pickle gadget chains execute arbitrary Python code with the privileges of the
 user running the application. NLTK provides a RestrictedUnpickler for safe deserialization, but it is not
 used by production code paths. Fixed in 3.10.0. (CVE-2026-78683)

Solution

Update the nltk library and its related packages to version 3.10.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-78683

Plugin Details

Severity: Critical

ID: 459929

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: Medium

Score: 5

Percentile: 93.48

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-78683

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.6

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.4

Threat Score: 8.6

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/9/2026

Vulnerability Publication Date: 8/25/2026

Reference Information

CVE: CVE-2026-78683