CVE-2026-22892
Medium
Description
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to validate user permissions when creating Jira issues from Mattermost posts, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to via the /create-issue API endpoint by providing the post ID of an inaccessible post.. Mattermost Advisory ID: MMSA-2025-00550
SeverityMedium
CVSS4.3
Exploit probability—
Product
Mattermost Server
PublishedFeb 13, 2026
First seenFeb 13, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server10.11.10, 11.1.3, 11.2.2 or later
- github.com/mattermost/mattermost-server11.2.2, 11.1.3, 10.11.10, 10.11.10+incompatible, 11.1.3+incompatible, 11.2.2+incompatible or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.10, 11.0.0 ≤ v < 11.1.3, 11.2.0 ≤ v < 11.2.2 | 10.11.10, 11.1.3, 11.2.2 |
| github.com/mattermost/mattermost-serverGo | 11.2.0 ≤ v < 11.2.2, 11.1.0 ≤ v < 11.1.3, 10.11.0 ≤ v < 10.11.10, 10.11.0+incompatible ≤ v < 10.11.10+incompatible, 11.1.0+incompatible ≤ v < 11.1.3+incompatible, 11.2.0+incompatible ≤ v < 11.2.2+incompatible | 11.2.2, 11.1.3, 10.11.10, 10.11.10+incompatible, 11.1.3+incompatible, 11.2.2+incompatible |
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