MEDIUMCVSS v3.1 4.3Vulnerability
CVE-2026-18256
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
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-20T21:14:08.448323+00:00
- Epss score
- 0.00162
- Cvss score
- 4.3
- Cvss severity
- MEDIUM
- Retrieved at
- 2026-10-21T01:24:49+00:00
- Last source
- FIRST EPSS
- Score
- 4.3
- Cvss version
- 3.1
- Cve id
- CVE-2026-18256
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- First seen by Signal
- 2026-10-18T13:39:03+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Published at
- 2026-10-16T08:17:12.863
- Last modified
- 2026-10-16T19:23:18.623
- Epss percentile
- 0.04955
Related Entities (1)
HAS_WEAKNESS (1)
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