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CVE-2026-75588

nvd nist
Published: Sep 17, 2026Modified: Oct 13, 2026

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2.6
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
Exploitability: 1.2 / Impact: 1.4
Source: responsibledisclosure@mattermost.com (Secondary)

Description

Mattermost Desktop App versions <=6.2 6.2.2.0 fail to validate the URL scheme when checking whether a target URL is internal to the connected server, which allows a network-positioned attacker to load a plugin popout window over an insecure connection via a link using a downgraded URL scheme. Mattermost Advisory ID: MMSA-2026-00717

Affected (1)

Mattermost
1 product
Mattermost Desktop
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Mattermost Desktop
6.2.0 ≤ version < 6.2.3

Related CWEs

CWE-1287
Improper Validation of Specified Type of Input
The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

References (1)

Source: responsibledisclosure@mattermost.com
Vendor Advisory

Timeline

No history available yet.