CVE-2026-8075 — MEDIUM (6.5)

Q: How severe is CVE-2026-8075?

CVE-2026-8075 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-8075?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost Desktop.

Vulnerability Description

Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop App via posting a malicious link with an embedded image that misses one of those headers. Mattermost Advisory ID: MMSA-2026-00668

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Mattermost	Mattermost Desktop	>= 5.5.13, < 5.13.6

Related Weaknesses (CWE)

CWE-754

References

https://mattermost.com/security-updatesVendor Advisory

FAQ

What is CVE-2026-8075?

CVE-2026-8075 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Mattermost Desktop App versions <=6.2 5.5.13 6.0.2.0 fail to properly null check when checking for headers in the Mattermost Desktop App which allows any user to crash another channel members Desktop ...

How severe is CVE-2026-8075?

CVE-2026-8075 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-8075?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost Desktop.