What’s Vulnerable › Vulnerabilities

CVE-2026-29794: Vikunja has Rate-Limit Bypass for Unauthenticated Users via Spoofed Headers

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-20 · updated 2026-06-17
• Weakness: CWE-807

Description

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 products

• go-vikunja vikunja: from 0.8 before 2.2.0 — fixed in 2.2.0

How to fix

Upgrade to a fixed version: go-vikunja vikunja 2.2.0. Check the vendor advisory for mitigations.

References

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

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