Detections
Analytics

Echo: nltk: security update to 3.10.3

high Tenable Cloud Security Plugin ID 461730

Description

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

 - NLTK before 3.10.3 contains a server-side request forgery vulnerability in nltk.pathsec.urlopen (and
 callers nltk.data.load, nltk.downloader.Downloader.index/download) when an HTTP proxy is configured.
 pathsec.urlopen validates the requested hostname locally, but proxy-handler inheritance disables the safe
 HTTP/HTTPS handlers so the actual fetch is performed by the proxy against a destination that is never re-
 validated. An attacker can supply a validated public URL that the proxy forwards to an internal loopback-
 only service, allowing disclosure of internal HTTP resources, loading of forged downloader indexes, and
 installation of attacker-chosen package content. (CVE-2026-78682)

Solution

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

See Also

https://advisory.echohq.com/cve/CVE-2026-78682

Plugin Details

Severity: High

ID: 461730

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: 23.61

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-2026-78682

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

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

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-2026-78682