Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8 (GHSA-m2w9-h2mm-79qr)

high Tenable Self-Hosted Container Security Plugin ID 446256

Description

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

 - Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 fail to
 require system-level permission when patching protected default system roles, which allows authenticated
 users with delegated user-management permissions to escalate privileges by altering built-in role
 permissions via the role patch API.. Mattermost Advisory ID: MMSA-2026-00656 (CVE-2026-6739)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 10.11.17 or later.

See Also

https://github.com/advisories/GHSA-m2w9-h2mm-79qr

Plugin Details

Severity: High

ID: 446256

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 8/25/2026

Updated: 8/25/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.96

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-6739

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/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: 6/12/2026

Vulnerability Publication Date: 6/12/2026

Reference Information

CVE: CVE-2026-6739

cwe: CWE-863