CVEvulnerability

CVE-2026-28431

9.2 CRITICAL Published 2026-03-10 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-03-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 4.0 ([email protected])
9.2 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-285

Description

Misskey is an open source, federated social media platform. All Misskey servers running versions 8.45.0 and later, but prior to 2026.3.1, contain a vulnerability that allows bad actors access to data that they ordinarily wouldn't be able to access due to insufficient permission checks and proper input validation. This vulnerability occurs regardless of whether federation is enabled or not. This vulnerability could lead to a significant data breach. This vulnerability is fixed in 2026.3.1.

Affected configurations

• misskey misskey (>= 8.45.0 < 2026.3.1)

Related

Weakness · CWE (1)

  • CWE-285 Improper Authorization weakness

References