Mattermost Jira Plugin Authenticated Read via /create-issue v11.2.1,10.11.9
CVE-2026-22892 Published on February 13, 2026
Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments
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
Vulnerability Analysis
CVE-2026-22892 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-22892 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-22892
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Affected Versions
Mattermost:- Version 11.1.0, <= 11.1.2 is affected.
- Version 10.11.0, <= 10.11.9 is affected.
- Version 11.2.0, <= 11.2.1 is affected.
- Version 11.3.0 is unaffected.
- Version 11.1.3 is unaffected.
- Version 10.11.10 is unaffected.
- Version 11.2.2 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.