Medium severity · published Jul 13, 2026
CVE-2026-6541
Unscoped updates to other playbooks' metric configuration
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team access to alter another user’s playbook metric settings via a crafted import or update request with a foreign metric ID. Mattermost Advisory ID: MMSA-2026-00653
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
11.7.0 through 11.7.1; 11.6.0 through 11.6.4; 10.11.0 through 10.11.19 · source: vendor
MS
Mattermost Server · Mattermost
10.11.0 before 10.11.20; 11.6.0 before 11.6.5; 11.7.0 before 11.7.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6541
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6541
Vendor Advisory
https://mattermost.com/security-updates
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