Detections
Analytics

SCA: security update for github.com/mattermost/mattermost/server/v8 (GHSA-3439-vqgj-2gcf)

high Tenable Self-Hosted Container Security Plugin ID 439586

Description

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

 - Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to
 sanitize user-controlled post content in the mmctl commands terminal output which allows attackers to
 manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences that
 enable screen manipulation, fake prompts, and clipboard hijacking.. Mattermost Advisory ID:
 MMSA-2026-00599 (CVE-2026-3108)

Solution

Update the github.com/mattermost/mattermost/server/v8 library and its related packages to version 10.11.11 or later.

See Also

https://github.com/advisories/GHSA-3439-vqgj-2gcf

Plugin Details

Severity: High

ID: 439586

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 4/1/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.88

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-3108

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/26/2026

Vulnerability Publication Date: 3/26/2026

Reference Information

CVE: CVE-2026-3108

cwe: CWE-150