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SCA: security update for github.com/mattermost/mattermost-server (GHSA-ffpr-pfr4-g354)

medium Tenable Cloud Security Plugin ID 444094

Description

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

 - Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to
 sanitize team member data when returned via API to users without elevated permissions which allows a user
 without permissions to get data about team members roles via invoking various team API endpoints..
 Mattermost Advisory ID: MMSA-2026-00626 (CVE-2026-3636)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 10.11.15 or later.

See Also

https://github.com/advisories/GHSA-ffpr-pfr4-g354

Plugin Details

Severity: Medium

ID: 444094

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 6/27/2026

Updated: 6/27/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.2

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-2026-3636

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: 5/26/2026

Vulnerability Publication Date: 5/22/2026

Reference Information

CVE: CVE-2026-3636

cwe: CWE-200