CVE-2026-3637
EUVD-2026-3074118.05.2026, 08:16
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check the create_post channel permission during post edit operations which allows an authenticated attacker with revoked posting privileges to modify their existing posts via direct API requests to the post update and patch endpoints.. Mattermost Advisory ID: MMSA-2026-00627Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| mattermost | mattermost_server | 10.11.0 ≤ 𝑥 < 10.11.14 |
| mattermost | mattermost_server | 11.4.0 ≤ 𝑥 < 11.4.4 |
| mattermost | mattermost_server | 11.5.0 ≤ 𝑥 < 11.5.2 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| mattermost | mattermost | 11.5.0 ≤ 𝑥 ≤ 11.5.1 | CNA |
| mattermost | mattermost | 10.11.0 ≤ 𝑥 ≤ 10.11.13 | CNA |
| mattermost | mattermost | 11.4.0 ≤ 𝑥 ≤ 11.4.3 | CNA |
Common Weakness Enumeration
References