CVE-2026-3114
EUVD-2026-1624226.03.2026, 17:16
Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate decompressed archive entry sizes during file extraction which allows authenticated users with file upload permissions to cause a denial of service via crafted zip archives containing highly compressed entries (zip bombs) that exhaust server memory.. Mattermost Advisory ID: MMSA-2026-00598
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| mattermost | mattermost_server | 10.11.0 ≤ 𝑥 < 10.11.12 |
| mattermost | mattermost_server | 11.2.0 ≤ 𝑥 < 11.2.4 |
| mattermost | mattermost_server | 11.3.0 ≤ 𝑥 < 11.3.2 |
| mattermost | mattermost_server | 11.4.0 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| mattermost | mattermost | 𝑥 ≤ 11.4.0 | CNA |
| mattermost | mattermost | 11.3.0 ≤ 𝑥 ≤ 11.3.1 | CNA |
| mattermost | mattermost | 11.2.0 ≤ 𝑥 ≤ 11.2.3 | CNA |
| mattermost | mattermost | 10.11.0 ≤ 𝑥 ≤ 10.11.11 | CNA |
Common Weakness Enumeration
References