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VULNERABILITIES

CVE-2026-28431 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/misskey-dev/misskey/security/advisories/GHSA-r33c-qg3g-v9cr [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-285Improper Authorization[email protected]

Affected Products

ProductVersions
misskey misskey
>= 8.45.0, < 2026.3.1

CPE

  • cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-28431
NVD Published Date:
Mar 10, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-28431 Details - Not Deferred