PT-2026-42799
CVE-2026-28735
·
Published
2026-05-22
·
Updated
2026-09-18
Description by
CVSS 3.1
5.4
MediumMetricsAV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Name of the Vulnerable Software and Affected Versions
Mattermost version 11.6.0
Mattermost version 11.5.3
Mattermost version 11.4.4
Mattermost version 10.11.14
Description
An issue exists where the software fails to validate the OAuth token scope during the callback process. This allows an authenticated user to gain unauthorized access to private repositories by modifying the
scope parameter within the GitHub authorization URL.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploitability
Exploit
Impacts
Researchers
Vendors
Affected products
Found an issue in the description? Have something to add? Feel free to write us 👾