CVE-2026-28432 HIGH

CVE-2026-28432: HTTP signature verification can be bypassed

Vendor Misskey-Dev
Product misskey
Weakness CWE-347
Published March 9, 2026
Last update March 10, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 9, 2026 CVE published
March 10, 2026 Record updated