CVE-2026-28432

HIGH

Misskey <2026.3.1 - Auth Bypass

Title source: llm

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.

References (1)

[Vendor Advisory] https://github.com/misskey-dev/misskey/security/advisories/GHSA-grwc-c762-gcvp

Scores

CVSS v3 7.5

EPSS 0.0002

EPSS Percentile 4.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE

CWE-347

Status published

Products (1)

misskey/misskey < 2026.3.1

Published Mar 10, 2026

Tracked Since Mar 10, 2026