CVE-2026-28433CWE-639CWE-862

Misskey lacks resource ownership validation

Low · published March 9, 2026

CVSS v4.0
2.3
EPSS
0%
Percentile
19.5
In the wild
Unconfirmed
What it is

Misskey is an open source, federated social media platform. All Misskey servers running versions 10.93.0 and later, but prior to 2026.3.1, contain a vulnerability that allows importing other users' data due to lack of ownership validation. The impact of this vulnerability is estimated to be relatively low, as bad actors would require the ID corresponding to the target file for import. This vulnerability is fixed in 2026.3.1.

The record
Technical detail
CVSS v4.0
2.3 · LOW
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00281 · 19.5th percentile
Weaknesses
CWE-639 · Authorization Bypass Through User-Controlled Key; CWE-862 · Missing Authorization
Published
2026-03-09T21:21Z
EPSS history
Timeline
  • 09 MAR 21:21Z
    Misskey lacks resource ownership validation
    cvelistv5