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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.

PUBLISHED Reserved 2026-02-27 | Published 2026-03-09 | Updated 2026-03-10 | Assigner GitHub_M




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-347: Improper Verification of Cryptographic Signature

Product status

< 2026.3.1
affected

References

github.com/...isskey/security/advisories/GHSA-grwc-c762-gcvp

cve.org (CVE-2026-28432)

nvd.nist.gov (CVE-2026-28432)

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