PT-2026-67531 · Misskey Dev · Misskey

CVE-2026-46713 · Published 2026-08-03 · Updated 2026-08-03

Mitre

CVSS v4.0

9.2

Critical

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:H/SA:N

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.

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-46713

Affected Products

Misskey

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-46713 · Security Note
• https://github.com/misskey-dev/misskey/security/advisories/GHSA-w8x2-gpq6-jxvf · Note
• https://github.com/misskey-dev/misskey/releases/tag/2026.5.4 · Note