CVE-2026-7387— Mattermost group syncable endpoints allow privilege escalation via scheme_admin
Possible ATT&CK Techniques 1AI
T1078 · Valid AccountsAffected Version Matrix 9
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 11.6.0≤ 11.6.1 | affected |
11.5.0≤ 11.5.4 | affected | ||
10.11.0≤ 10.11.15 | affected | ||
10.11.0≤ 10.11.16 | affected | ||
11.7.0 | unaffected | ||
11.6.2 | unaffected | ||
11.5.5 | unaffected | ||
10.11.16 | unaffected | ||
| … +1 more rows | |||
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I. Basic Information for CVE-2026-7387
Vulnerability Information
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Vulnerability Title
Mattermost group syncable endpoints allow privilege escalation via scheme_admin
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group syncable link and patch endpoints, which allows a user with group-link permissions to escalate themselves and group members to team or channel admin via crafted API requests.. Mattermost Advisory ID: MMSA-2026-00665
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mattermost | Mattermost | 11.6.0 ~ 11.6.1 | - |
II. Public POCs for CVE-2026-7387
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · Mattermost · 2026-06-12 · 7 CVEs total
| CVE-2026-6961 | 7.6 HIGH | CVE-2026-6961: Path traversal via unsanitized FileInfo.Name in Mattermost federation sync |
| CVE-2026-6739 | 6.7 MEDIUM | Mattermost: Delegated admins could patch protected default system roles |
| CVE-2026-7184 | 6.5 MEDIUM | Mattermost Remote Cluster PATCH API Leaks Authentication Tokens |
| CVE-2026-6046 | 5.3 MEDIUM | Plugin bot username conflict allows user account to be used as bot identity in Mattermost |
| CVE-2026-6689 | 4.3 MEDIUM | *Missing* {{invite_user}} *permission check on team creation allows unprivileged users to |
| CVE-2026-3433 | 4.3 MEDIUM | Mattermost fails to scope role_updated websocket events to authorized team and channel mem |
IV. Related Vulnerabilities
Same product: Mattermost
- CVE-2026-6961
CVE-2026-6961: Path traversal via unsanitized FileInfo.Name - CVE-2026-6046
Plugin bot username conflict allows user account to be used - CVE-2026-6689
*Missing* {{invite_user}} *permission check on team creation - CVE-2026-7184
Mattermost Remote Cluster PATCH API Leaks Authentication Tok - CVE-2026-6739
Mattermost: Delegated admins could patch protected default s
Same vendor: Mattermost
- CVE-2026-6961
CVE-2026-6961: Path traversal via unsanitized FileInfo.Name - CVE-2026-6046
Plugin bot username conflict allows user account to be used - CVE-2026-6689
*Missing* {{invite_user}} *permission check on team creation - CVE-2026-7184
Mattermost Remote Cluster PATCH API Leaks Authentication Tok - CVE-2026-6739
Mattermost: Delegated admins could patch protected default s
Same weakness: CWE-863
- CVE-2026-34023
Broken WebSocket authorization in Wertheim SafeController So - CVE-2026-2470
Pagelayer <= 2.0.9 - Incorrect Authorization to Authenticate - CVE-2026-53834
OpenClaw < 2026.4.27 - Authorization Bypass in QQBot Pre-dis - CVE-2026-53835
OpenClaw < 2026.5.6 - Config-Write Enforcement Bypass in Fei - CVE-2026-53828
OpenClaw < 2026.5.6 - Native Command Authorization Bypass vi
V. Comments for CVE-2026-7387
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