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HIGHCVE-2026-28432Published Modified CNA GitHub_M

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

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.

Metrics

CVSS v4.0
7.1
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • misskey-dev / misskey
    < 2026.3.1
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
References