PT-2026-57664 · Mattermost · Mattermost
Arang
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Published
2026-07-13
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Updated
2026-07-13
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CVE-2026-9708
CVSS v3.1
4.9
Medium
| Vector | AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to validate that an assigned incoming webhook user has access to the target team or channel, which allows a requester with webhook management permissions to create posts or direct messages attributed to another user via crafted incoming webhook configuration and payloads.. Mattermost Advisory ID: MMSA-2026-00683
Fix
IDOR
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Weakness Enumeration
Related Identifiers
Affected Products
Mattermost