What’s Vulnerable › Vulnerabilities
CVE-2026-28432: HTTP signature verification can be bypassed
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-10 · updated 2026-06-17
- Weakness: CWE-347
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.
Affected products
- misskey-dev misskey: before 2026.3.1 — fixed in 2026.3.1
How to fix
Upgrade to a fixed version: misskey-dev misskey 2026.3.1. Check the vendor advisory for mitigations.
References
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