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

CVE-2026-28432

CVE-2026-28432

Description

Misskey is an open source, federated social media platform. All Misskey servers prior to 2026.3.1 contain a vulnerability that allows bypassing HTTP signature verification. Although this is a vulnerability related to federation, it affects all servers regardless of whether federation is enabled or disabled. 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: <2026.3.1
    • (no CPE)range: <2026.3.1
    • (no CPE)range: < 2026.3.1

Patches

Vulnerability mechanics

References

1

News mentions

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