CVE-2026-46713 Misskey: JSON-LD signature validation + compaction may lead to improper activity handling
Attackers can spoof activities as valid due to flawed JSON-LD signature validation, bypassing security checks in Misskey.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-46713?
CVE-2026-46713 is a critical vulnerability in misskey-dev misskey, published on 3 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Misskey is an open source, federated social media platform. Versions 12.37.0 and later, but prior to 2026.5.4, contain a vulnerability in the JSON-LD signature validation and compaction process that allows spoofed activities to be accepted as valid. This issue has been fixed in version 2026.5.4.
Weakness: CWE-347
Which versions are affected by CVE-2026-46713?
How do I fix CVE-2026-46713?
No fix has been published for CVE-2026-46713 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-46713 being exploited?
There is no known exploitation of CVE-2026-46713 in the wild and no public exploit code.
Sources
Also known as GHSA-w8x2-gpq6-jxvf.