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High severity7.5NVD Advisory· Published Mar 10, 2026· Updated Jun 17, 2026

CVE-2026-28431

CVE-2026-28431

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 products

3
  • Misskey Dev/Misskey3 versions
    cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:misskey:misskey:*:*:*:*:*:*:*:*range: >=8.45.0,<2026.3.1
    • (no CPE)range: >=8.45.0,<2026.3.1
    • (no CPE)range: >= 8.45.0, < 2026.3.1

Patches

Vulnerability mechanics

References

1

News mentions

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