CyberRota Analysis
AI-GeneratedMisskey, an open-source federated social media platform, has a vulnerability in versions 2025.3.2 through 2026.5.3 that allows unauthorized access to certain data points within the Direct Messages feature due to insufficient permission checks. This issue poses a risk of data exposure regardless of account permissions and federation settings. Organizations using affected versions should prioritize upgrading to version 2026.5.4 to mitigate potential data breaches.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Misskey is an open source, federated social media platform. Versions 2025.3.2 and later, but prior to 2026.5.4, contain a vulnerability where a lack of proper permission checks allows access to certain data points from the Direct Messages (formerly Chat) feature, regardless of account permissions. This vulnerability occurs whether or not federation is enabled. Notes created with "specified" visibility (formerly "direct" visibility) are not affected. This issue has been fixed in version 2026.5.4.