CVE-2026-47746
Misskey: JSON-LD signature validation + compaction is vulnerable to timing attacks
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-367 |
| Vendor | misskey-dev |
| Product | misskey |
| Published | Aug 3, 2026 |
Stay Ahead of the Next One
Get instant alerts for misskey-dev misskey
Be the first to know when new unknown vulnerabilities affecting misskey-dev misskey are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
misskey-dev / misskey
>= 12.37.0, < 2026.5.4