CVE-2026-8075

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_desktop::::::::
	cpe:2.3:a:mattermost:mattermost_desktop::::::::
	cpe:2.3:a:mattermost:mattermost_desktop::::::::

History

No history.

Information

Published : 2026-07-17 11:17

Updated : 2026-07-30 14:44

NVD link : CVE-2026-8075

Mitre link : CVE-2026-8075

CVE.ORG link : CVE-2026-8075

JSON object : View

Products Affected

mattermost

mattermost_desktop

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

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