Detections
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SCA: security update for github.com/mattermost/mattermost-server (GHSA-jqgv-39mg-7c2r)

medium Tenable Self-Hosted Container Security Plugin ID 448011

Description

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

 - Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to
 authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a
 rogue sharedSecret and disrupt the Jira integration via POST to /ac/installed during the pending-install
 window.. Mattermost Advisory ID: MMSA-2026-00654 (CVE-2026-6673)

Solution

Update the github.com/mattermost/mattermost-server library and its related packages to version 10.11.18 or later.

See Also

https://github.com/advisories/GHSA-jqgv-39mg-7c2r

Plugin Details

Severity: Medium

ID: 448011

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 9/16/2026

Updated: 9/16/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.61

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 4.9

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

CVSS Score Source: CVE-2026-6673

CVSS v3

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.6

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/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: 6/22/2026

Vulnerability Publication Date: 6/18/2026

Reference Information

CVE: CVE-2026-6673

cwe: CWE-306