Vulnerability library
Security checkJanuary 06, 2026

Misskey has a login rate limit bypass via spoofed X-Forwarded-For header

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Medium severitynpmmisskey-js

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Description

When using an untrusted reverse proxy or not using a reverse proxy at all, attackers can bypass IP rate limiting by adding a forged X-Forwarded-For header. Starting with version 2025.9.1, an option (trustProxy) has been added in config file to prevent this from happening.

Recommendation

Update the misskey-js package to the latest compatible version. Followings are version details:

  • Affected version(s): >= 2025.9.1, < 2025.12.0-alpha.2
  • Patched version(s): 2025.12.0-alpha.2

References

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Related Issues

See something that needs correcting? Let us knowUpdated January 06, 2026