Detections
Analytics

SCA: security update for github.com/mattermost/mattermost/server/v8 (GHSA-mpc7-mm28-f6wq)

medium Tenable Self-Hosted Container Security Plugin ID 439591

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
 apply view restrictions when retrieving group member IDs, which allows authenticated guest users to
 enumerate user IDs outside their allowed visibility scope via the group retrieval endpoint.. Mattermost
 Advisory ID: MMSA-2026-00594 (CVE-2026-3115)

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-mpc7-mm28-f6wq

Plugin Details

Severity: Medium

ID: 439591

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: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2026-3115

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

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-2026-3115

cwe: CWE-863