CVE-2026-0997 — MEDIUM (4.3)

Q: How severe is CVE-2026-0997?

CVE-2026-0997 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-0997?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost Server, Mattermost Zoom.

Vulnerability Description

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate the authenticated user when processing {{/plugins/zoom/api/v1/channel-preference}}, which allows any logged-in user to change Zoom meeting restrictions for arbitrary channels via crafted API requests.. Mattermost Advisory ID: MMSA-2025-00558

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 10.11.0, < 10.11.10
Mattermost	Zoom	<= 1.11.0

Related Weaknesses (CWE)

CWE-863

References

https://mattermost.com/security-updatesVendor Advisory

FAQ

What is CVE-2026-0997?

CVE-2026-0997 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate the authenticated user when processing {{/plugins/zoom/api/v1/c...

How severe is CVE-2026-0997?

CVE-2026-0997 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-0997?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost Server, Mattermost Zoom.