CVE-2026-4635
EUVD-2026-3143122.05.2026, 11:16
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
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| mattermost | mattermost_server | 10.11.0 ≤ 𝑥 < 10.11.15 |
| mattermost | mattermost_server | 11.4.0 ≤ 𝑥 < 11.4.5 |
| mattermost | mattermost_server | 11.5.0 ≤ 𝑥 < 11.5.4 |
| mattermost | mattermost_server | 11.6.0 ≤ 𝑥 < 11.6.1 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| mattermost | mattermost | 𝑥 ≤ 11.6.0 | CNA |
| mattermost | mattermost | 11.5.0 ≤ 𝑥 ≤ 11.5.3 | CNA |
| mattermost | mattermost | 11.4.0 ≤ 𝑥 ≤ 11.4.4 | CNA |
| mattermost | mattermost | 10.11.0 ≤ 𝑥 ≤ 10.11.14 | CNA |
References