CVE-2026-47746 Misskey: JSON-LD signature validation + compaction is vulnerable to timing attacks

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...