PT-2026-115507 · Mattermost · Mattermost
CVSS v3.1
5.0
Medium
| Vector | AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N |
Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to validate the invited recipient's email address when redeeming team and guest invitation tokens, which allows an authenticated attacker to join a team or gain unauthorized access to private channels via a forwarded or leaked invitation link.. Mattermost Advisory ID: MMSA-2026-00747
Fix
Incorrect Authorization
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Weakness Enumeration
Related Identifiers
Affected Products
Mattermost