Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8 (GHSA-8qq9-cqj8-82w4)

high Tenable Self-Hosted Container Security Plugin ID 446259

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
 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync,
 which allows an attacker who controls a federated server to write files to arbitrary locations within the
 target server's filestore via path traversal sequences in the filename field.. Mattermost Advisory ID:
 MMSA-2026-00661 (CVE-2026-6961)

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-8qq9-cqj8-82w4

Plugin Details

Severity: High

ID: 446259

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 8/25/2026

Updated: 8/25/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.79

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-6961

CVSS v3

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.6

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

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-2026-6961

cwe: CWE-22