Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8 (GHSA-ph22-fw5m-w2q9)

medium Tenable Self-Hosted Container Security Plugin ID 438914

Description

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

 - Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to sanitize client-
 supplied post metadata which allows an authenticated attacker to spoof permalink embeds impersonating
 other users via crafted PUT requests to the post update API endpoint.. Mattermost Advisory ID:
 MMSA-2025-00569 (CVE-2026-2457)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 10.11.11 or later.

See Also

https://github.com/advisories/GHSA-ph22-fw5m-w2q9

Plugin Details

Severity: Medium

ID: 438914

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 3/18/2026

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-2026-2457

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: 3/16/2026

Vulnerability Publication Date: 3/16/2026

Reference Information

CVE: CVE-2026-2457

cwe: CWE-346