CVE-2026-9693
3.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Summary
Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Mattermost fails to remove thread membership records when a user is removed from or leaves a team, which allows a previously removed user who is later re-invited to the team to view private channel thread root post content and metadata via the team threads API.. Mattermost Advisory ID: MMSA-2026-00682
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 10.11.0 <= 10.11.20 | affected |
| Mattermost | Mattermost | 11.7.0 <= 11.7.5 | affected |
| Mattermost | Mattermost | 11.9.0 | unaffected |
| Mattermost | Mattermost | 10.11.21 | unaffected |
| Mattermost | Mattermost | 11.7.6 | unaffected |
Weaknesses
- CWE-459: CWE-459: Incomplete Cleanup
References
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