# CVE-2026-1046

## Summary

- **CVE ID:** CVE-2026-1046
- **Severity:** HIGH
- **CVSS Score:** 7.6 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L)
- **CWE:** CWE-939
- **Published:** Feb 16, 2026
- **Last Modified:** Mar 12, 2026

## Description

Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577

## Affected Products

- Mattermost — Mattermost (0)
- Mattermost — Mattermost (6.1.0)
- Mattermost — Mattermost (6.0.3.0)
- Mattermost — Mattermost (5.13.3.0)

## References

- [CNA](https://mattermost.com/security-updates)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.24%
- **EPSS Percentile:** 14.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-13._