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CVE-2026-6541— Unscoped updates to other playbooks' metric configuration

CVSS 4.3 · Medium EPSS 0.15% · P5

Affected Version Matrix 7

VendorProductVersion RangeStatus
MattermostMattermost11.7.0≤ 11.7.1affected
11.6.0≤ 11.6.4affected
10.11.0≤ 10.11.19affected
11.8.0unaffected
11.7.2unaffected
11.6.5unaffected
10.11.20unaffected
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I. Basic Information for CVE-2026-6541

Vulnerability Information
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Vulnerability Title
Unscoped updates to other playbooks' metric configuration
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 11.7.x <= 11.7.1, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to restrict metric configuration changes to the playbook being saved, which allows an authenticated user with team access to alter another user’s playbook metric settings via a crafted import or update request with a foreign metric ID. Mattermost Advisory ID: MMSA-2026-00653
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
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存在授权问题漏洞，该漏洞源于未能限制度量配置更改仅针对被保存的playbook，可能导致具有团队访问权限的经过身份验证的用户通过带有外部度量ID的特制导入或更新请求更改其他用户的playbook度量设置。以下版本受到影响：11.7.1及之前的11.7.x版本、11.6.4及之前的11.6.x版本、10.11.19及之前的10.11.x版本。
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

VendorProductAffected VersionsCPESubscribe
MattermostMattermost 11.7.0 ~ 11.7.1 -

II. Public POCs for CVE-2026-6541

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III. Intelligence Information for CVE-2026-6541

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Same Patch Batch · Mattermost · 2026-07-13 · 10 CVEs total

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CVE-2026-95715.9 MEDIUMDeactivated user accounts can continue to obtain valid OAuth access tokens via refresh tok
CVE-2026-95975.4 MEDIUMDeactivated guest accounts can authenticate via magic-link token in Mattermost REST API lo
CVE-2026-100855.4 MEDIUMOrdinary group/direct message member can enable group_constrained and remove all channel p
CVE-2026-97084.9 MEDIUMIncoming webhook user attribution via unvalidated webhook owner
CVE-2026-98244.3 MEDIUMRemote cluster metadata enumeration via /share-channel autocomplete
CVE-2026-101034.3 MEDIUMAuthenticated remote cluster can modify or delete posts it does not own in Mattermost Conn
CVE-2026-98203.8 LOWMattermost schemes teams endpoint exposes private team invite IDs

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-639

V. Comments for CVE-2026-6541

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