CyberRota Analysis
AI-GeneratedVersions 12.37.0 through 2026.5.3 of the Misskey platform are vulnerable to timing attacks during JSON-LD signature validation, which can lead to a time-of-check to time-of-use (TOCTOU) flaw. This vulnerability allows attackers to manipulate the application into accepting fraudulent information, compromising data integrity. Organizations using affected versions should prioritize upgrading to version 2026.5.4 to mitigate this risk.
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 12.37.0 and later, but prior to 2026.5.4, are vulnerable to timing attacks during JSON-LD signature validation and the compaction process. Because the JSON-LD parsing context is not shared between signature verification and subsequent processing, the application may trust information that should not be trusted, resulting in a time-of-check to time-of-use (TOCTOU) flaw. This allows an attacker to have fraudulent activities accepted as valid, leading to a loss of integrity. This issue has been fixed in version 2026.5.4.