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 properly restrict private teams from public team search results, which allows an authenticated user without permission to list private teams to disclose the ID, name, and display name of private teams via a modified team search request. Mattermost Advisory ID: MMSA-2026-00748
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://mattermost.com/security-updates |
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History
Fri, 23 Oct 2026 13:15:00 +0000
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Mattermost
Mattermost mattermost |
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| Vendors & Products |
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Mattermost mattermost |
Fri, 16 Oct 2026 12:30:00 +0000
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ssvc
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Fri, 16 Oct 2026 07:30:00 +0000
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| Description | 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 properly restrict private teams from public team search results, which allows an authenticated user without permission to list private teams to disclose the ID, name, and display name of private teams via a modified team search request. Mattermost Advisory ID: MMSA-2026-00748 | |
| Title | Private team metadata disclosure via the team search API | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2026-10-16T07:13:43.684Z
Updated: 2026-10-16T11:58:08.912Z
Reserved: 2026-07-29T16:21:51.519Z
Link: CVE-2026-18256
Updated: 2026-10-16T11:58:00.299Z
Status : Awaiting Analysis
Published: 2026-10-16T08:17:12.863
Modified: 2026-10-16T19:23:18.623
Link: CVE-2026-18256
No data.