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I. Basic Information for CVE-2026-1046
Vulnerability Information

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Vulnerability Title
Arbitrary application execution via unvalidated server-controlled URLs in Help menu
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
自定义URL方案处理程序中的授权不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost Desktop App 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Desktop App是美国Mattermost公司的一款消息传递桌面版应用程序。 Mattermost Desktop App 6.0版本、6.2.0版本和5.2.13.0版本存在安全漏洞,该漏洞源于未验证帮助链接,可能导致恶意服务器通过用户点击菜单项执行任意可执行文件。
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 0 ~ 6.2.0 -
II. Public POCs for CVE-2026-1046
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III. Intelligence Information for CVE-2026-1046
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IV. Related Vulnerabilities
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