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CVE-2026-8074— Improper Permission Check Allows User Manager to Deactivate Bot Accounts

Quick assessment

Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mattermost是美国Mattermost公司开源的一个开源协作平台。 Mattermost 11.7.0及之前版本和10.11.17及之前版本存在授权问题漏洞，该漏洞源于用户活跃状态端点未强制执行机器人特定权限检查，可能导致具有用户管理写入权限但没有集成访问权限的用户管理器通过PUT /api/v4/users/{id}/active API端点停用机器人账户。

CVSS 3.8 · Low EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1548.001 · Setuid and Setgid

Affected Version Matrix 5

VendorProduct Version RangeStatus
Mattermost Mattermost 11.7.0≤ 11.7.0 affected
10.11.0≤ 10.11.17 affected
11.8.0 unaffected
11.7.1 unaffected
10.11.18 unaffected
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I. Basic Information for CVE-2026-8074

Vulnerability Information
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Vulnerability Title
Improper Permission Check Allows User Manager to Deactivate Bot Accounts
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to enforce bot-specific permission checks on the user active status endpoint, which allows a User Manager with user management write access but no Integrations access to deactivate bot accounts via the PUT /api/v4/users/{id}/active API endpoint.. Mattermost Advisory ID: MMSA-2026-00667
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司开源的一个开源协作平台。 Mattermost 11.7.0及之前版本和10.11.17及之前版本存在授权问题漏洞，该漏洞源于用户活跃状态端点未强制执行机器人特定权限检查，可能导致具有用户管理写入权限但没有集成访问权限的用户管理器通过PUT /api/v4/users/{id}/active API端点停用机器人账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mattermost Mattermost 11.7.0 ~ 11.7.0 -

II. Public POCs for CVE-2026-8074

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III. Intelligence Information for CVE-2026-8074

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Same Patch Batch · Mattermost · 2026-06-22 · 6 CVEs total

CVE-2026-6062 6.4 MEDIUM IDOR in Jira plugin subscription edit endpoint
CVE-2026-6673 6.4 MEDIUM Mattermost Jira plugin had unauthenticated {{/ac/installed}} lifecycle callback during pen
CVE-2026-5139 5.4 MEDIUM GitLab Plugin Allows Non-Admin Users to Modify Default Instance Configuration
CVE-2026-9162 4.3 MEDIUM Global session revocation does not invalidate active WebSocket connections
CVE-2026-8823 3.8 LOW User Manager can demote bot accounts to guest without bot-management permission

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-863

V. Comments for CVE-2026-8074

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