Moderate severityNVD Advisory· Published Feb 13, 2026· Updated Feb 13, 2026
Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments
CVE-2026-22892
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
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost-serverGo | >= 11.2.0, < 11.2.2 | 11.2.2 |
github.com/mattermost/mattermost-serverGo | >= 11.1.0, < 11.1.3 | 11.1.3 |
github.com/mattermost/mattermost-serverGo | >= 10.11.0, < 10.11.10 | 10.11.10 |
Affected products
1- Range: 11.1.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- github.com/advisories/GHSA-9pj7-jh2r-87g8ghsaADVISORY
- mattermost.com/security-updatesghsavendor-advisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-22892ghsaADVISORY
News mentions
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