Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-server (GHSA-j76w-p754-g2w7)

medium Tenable Cloud Security Plugin ID 442456

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, 11.4.x <= 11.4.3 Fail to validate the response
 body of proxied images, which allows a remote attacker to enact client-side DoS via an SVG file served
 from an attacker-controlled origin under a non-SVG Content-Type header (e.g. image/png) embedded in an
 og:image meta tag or Markdown image link.. Mattermost Advisory ID: MMSA-2026-00630 (CVE-2026-4054)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 0.0.0-20260414103857-b21ef302025e or later.

See Also

https://github.com/advisories/GHSA-j76w-p754-g2w7

Plugin Details

Severity: Medium

ID: 442456

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 5/29/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-4054

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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: 5/15/2026

Vulnerability Publication Date: 5/15/2026

Reference Information

CVE: CVE-2026-4054

cwe: CWE-754