Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8 (GHSA-mh4x-rmrx-3hp4)

medium Tenable Self-Hosted Container Security Plugin ID 440956

Description

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

 - Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to
 enforce atomic single-use consumption of guest magic link tokens, which allows an attacker with access to
 a valid magic link to establish multiple independent authenticated sessions via concurrent requests..
 Mattermost Advisory ID: MMSA-2026-00624 (CVE-2026-3590)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 10.11.13 or later.

See Also

https://github.com/advisories/GHSA-mh4x-rmrx-3hp4

Plugin Details

Severity: Medium

ID: 440956

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/29/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.71

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-3590

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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: 4/17/2026

Vulnerability Publication Date: 4/15/2026

Reference Information

CVE: CVE-2026-3590

cwe: CWE-367