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I. Basic Information for CVE-2026-28431
Vulnerability Information

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Vulnerability Title
Misskey lacks proper authorization checks and input validation
Source: NVD (National Vulnerability Database)
Vulnerability Description
Misskey is an open source, federated social media platform. All Misskey servers running versions 8.45.0 and later, but prior to 2026.3.1, contain a vulnerability that allows bad actors access to data that they ordinarily wouldn't be able to access due to insufficient permission checks and proper input validation. This vulnerability occurs regardless of whether federation is enabled or not. This vulnerability could lead to a significant data breach. This vulnerability is fixed in 2026.3.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Misskey 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Misskey是Misskey开源的一个永久免费的开源联合社交媒体平台。 Misskey 8.45.0版本至2026.3.1之前版本存在授权问题漏洞,该漏洞源于权限检查和输入验证不足,可能导致重大数据泄露。
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
misskey-devmisskey >= 8.45.0, < 2026.3.1 -
II. Public POCs for CVE-2026-28431
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III. Intelligence Information for CVE-2026-28431
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IV. Related Vulnerabilities
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