CVE-2026-1628
Preload Script Exposure in Mattermost Desktop
Publication date: 2026-03-02
Last updated on: 2026-03-05
Assigner: Mattermost, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mattermost | mattermost_desktop | to 5.13.4 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-829 | The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
Mattermost Desktop App versions up to and including 5.13.3 have a vulnerability where they fail to attach listeners that restrict navigation to external sites within the app. This flaw allows a malicious server to expose preload script functionality to untrusted servers if a user opens an external link in their Mattermost server.
How can this vulnerability impact me? :
This vulnerability can allow a malicious server to exploit the preload script functionality by tricking a user into opening an external link. This could lead to limited confidentiality and integrity impacts, as indicated by the CVSS score, potentially exposing sensitive information or allowing manipulation of data within the app.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know