Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server (GHSA-247x-7qw8-fp98)

medium Tenable Cloud Security Plugin ID 439495

Description

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

 - Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to rate
 limit login requests which allows unauthenticated remote attackers to cause denial of service (server
 crash and restart) via HTTP/2 single packet attack with 100+ parallel login requests.. Mattermost Advisory
 ID: MMSA-2025-00566 (CVE-2026-26233)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 10.11.12 or later.

See Also

https://github.com/advisories/GHSA-247x-7qw8-fp98

Plugin Details

Severity: Medium

ID: 439495

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 3/31/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-26233

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/25/2026

Vulnerability Publication Date: 3/25/2026

Reference Information

CVE: CVE-2026-26233

cwe: CWE-400