CVE-2026-46713CWE-347

CVE-2026-46713

published August 4, 2026

CVSS
9.2
EPSS
0%
Percentile
19.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
9.2 · NONE
CVSS v4.0
Not supplied
EPSS
0.00280 · 19.4th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-08-04T02:16Z
References (2)
https://github.com/misskey-dev/misskey/releases/tag/2026.5.4 · [email protected]https://github.com/misskey-dev/misskey/security/advisories/GHSA-w8x2-gpq6-jxvf · [email protected]
EPSS history
Timeline
  • 03 AUG 21:37Z
    Misskey: JSON-LD signature validation + compaction may lead to improper activity handling
    cvelistv5