Detections
Analytics

SCA: security update for github.com/mattermost/mattermost-plugin-msteams (GHSA-x274-8qfc-hrgf)

medium Tenable Cloud Security Plugin ID 441018

Description

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

 - Mattermost Plugins versions <=2.3.1 fail to limit the request body size on the {{/lifecycle}} webhook
 endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via
 sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610 (CVE-2026-21388)

Solution

Update the github.com/mattermost/mattermost-plugin-msteams library and its related packages to version 1.15.1-0.20260213190728-6fe4d295592e or later.

See Also

https://github.com/advisories/GHSA-x274-8qfc-hrgf

Plugin Details

Severity: Medium

ID: 441018

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 4/30/2026

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: Low

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-2026-21388

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: 4/9/2026

Vulnerability Publication Date: 4/9/2026

Reference Information

CVE: CVE-2026-21388

cwe: CWE-770