CVE-2026-28432
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Misskey
PublishedMar 10, 2026
First seenMar 10, 2026
Weakness typeCWE-347CWE-347
How to fix
Update
- misskey misskey2026.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| misskey misskey | v < 2026.3.1 | 2026.3.1 |
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