CVE-2026-4635

CVSS Score & Metrics

Base Score

5.3 / 10

Vector String

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

Vulnerability Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to archive the channel before removing persistent notifications which allows authenticated user to crash the server via timing the creation of persistent notification message between the server deleting existing persistent notifications and archiving the channel.. Mattermost Advisory ID: MMSA-2026-00637

Vulnerability Details

Published Date

May 22, 2026

Last Modified

May 22, 2026

CWE ID

CWE-362

Source

NVD

Vendor

mattermost

Product

mattermost_server

External References

https://mattermost.com/security-updates

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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