CVE-2026-29794

Vikunja has Rate-Limit Bypass for Unauthenticated Users via Spoofed Headers

Vikunja is an open-source self-hosted task management platform. Starting in version 0.8 and prior to version 2.2.0, unauthenticated users are able to bypass the application's built-in rate-limits by spoofing the `X-Forwarded-For` or `X-Real-IP` headers due to the rate-limit relying on the value of `(echo.Context).RealIP`. Unauthenticated users can abuse endpoints available to them for different potential impacts. The immediate concern would be brute-forcing usernames or specific accounts' passwords. This bypass allows unlimited requests against unauthenticated endpoints. Version 2.2.0 patches the issue.

Affected

go-vikunja · vikunja

CVSS v3.1 GITHUB

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.48% chance of exploitation in the next 30 days, 40th percentile

Published

2026-03-20

Proof-of-concept exploits (1)

• advisories/GHSA-m547-hp4w-j6jx

Security advisories

• go-vikunja/vikunja/security/advisories/GHSA-m547-hp4w-j6jx
• https://vikunja.io/changelog/vikunja-v2.2.0-was-released

References

• CVE Record
• NVD entry