Detections
Analytics

SCA: security update for github.com/mattermost/mattermost/server/v8 (GHSA-6cfr-wp44-6qmv)

medium Tenable Self-Hosted Container Security Plugin ID 443877

Description

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

 - Mattermost versions 11.5.x <= 11.5.1 fail to validate team-level run_create permission against the target
 team when creating a playbook run which allows an authenticated team member to create runs in teams where
 they lack permission via specifying a different team ID in the run creation API request. Mattermost
 Advisory ID: MMSA-2026-00629 (CVE-2026-4055)

Solution

Update the github.com/mattermost/mattermost/server/v8 library and its related packages to version 8.0.0-20260320113102-f2b3d1c6a945 or later.

See Also

https://github.com/advisories/GHSA-6cfr-wp44-6qmv

Plugin Details

Severity: Medium

ID: 443877

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 6/24/2026

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:N/I:P/A:N

CVSS Score Source: CVE-2026-4055

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:N/I:L/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: 5/21/2026

Vulnerability Publication Date: 5/21/2026

Reference Information

CVE: CVE-2026-4055

cwe: CWE-863