Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-6673

Severity CVSS v4.0:
Pending analysis
Type:
CWE-306 Missing Authentication for Critical Function
Publication date:
22/06/2026
Last modified:
23/06/2026

Description

Mattermost versions 11.7.x

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): High

Base Score 3.x
6.40
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* 10.11.0 (including) 10.11.18 (excluding)
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* 11.5.0 (including) 11.5.6 (excluding)
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* 11.6.0 (including) 11.6.3 (excluding)
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* 11.7.0 (including) 11.7.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools