CVE-2026-3112
Path Traversal in Mattermost Advanced Logging Allows File Disclosure
Publication date: 2026-03-26
Last updated on: 2026-03-30
Assigner: Mattermost, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mattermost | mattermost_server | From 10.11.0 (inc) to 10.11.12 (exc) |
| mattermost | mattermost_server | From 11.2.0 (inc) to 11.2.4 (exc) |
| mattermost | mattermost_server | From 11.3.0 (inc) to 11.3.2 (exc) |
| mattermost | mattermost_server | 11.4.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-22 | The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects certain versions of Mattermost (10.11.x up to 10.11.11, 11.2.x up to 11.2.3, 11.3.x up to 11.3.1, and 11.4.x up to 11.4.0). It occurs because these versions fail to properly validate the file target paths used in Advanced Logging configurations. This flaw allows system administrators to read arbitrary files on the host system by using a malicious AdvancedLoggingJSON configuration during support packet generation.
How can this vulnerability impact me? :
The vulnerability can lead to unauthorized disclosure of sensitive information because it allows system administrators to read arbitrary files on the host system. This could expose confidential data, configuration files, or other sensitive information stored on the server running Mattermost.