Detections
Analytics

SCA: security update for github.com/mattermost/mattermost/server/v8 (GHSA-86vc-mg26-fj6x)

high Tenable Cloud Security Plugin ID 439489

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
 prevent rendering of external SVGs on link embeds which allows unauthenticated users to crash the
 Mattermost webapp and desktop app via creating an issue or PR on GitHub.. Mattermost Advisory ID:
 MMSA-2026-00595 (CVE-2026-20719)

Solution

Update the github.com/mattermost/mattermost/server/v8 library and its related packages to version 10.11.2 or later.

See Also

https://github.com/advisories/GHSA-86vc-mg26-fj6x

Plugin Details

Severity: High

ID: 439489

Version: Revision 1.7

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: 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-2026-20719

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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-2026-20719

cwe: CWE-754