Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8 (GHSA-jx93-pf6x-874r)

medium Tenable Self-Hosted Container Security Plugin ID 442566

Description

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

 - Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to escape some variables that could contain
 malicious content during error page composition which allows an attacker with access to edit some site
 configuration to execute some malicious code via injecting some JS as part of those values.. Mattermost
 Advisory ID: MMSA-2026-00622 (CVE-2026-3495)

Solution

Update the github.com/mattermost/mattermost/server/v8 library and its related packages to version 10.11.14 or later.

See Also

https://github.com/advisories/GHSA-jx93-pf6x-874r

Plugin Details

Severity: Medium

ID: 442566

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 6/2/2026

Updated: 6/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.4

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

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

CVSS Score Source: CVE-2026-3495

CVSS v3

Risk Factor: Medium

Base Score: 4.8

Temporal Score: 4.2

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/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: 5/18/2026

Vulnerability Publication Date: 5/18/2026

Reference Information

CVE: CVE-2026-3495

cwe: CWE-79