CVE-2026-2458
Medium · 4.3CVSS
4.3
EPSS
0.2%
Published
Mar 16, 2026
CISA due date
—
The record
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly validate team membership when searching channels which allows a removed team member to enumerate all public channels within a private team via the channel search API endpoint.. Mattermost Advisory ID: MMSA-2025-00568
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 15.6 | govulncheck-vulndb | 0 | 0.0.20260326T203309-150000.1.155.2 |
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