Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M
CVE-2026-29794Vikunja has Rate-Limit Bypass for Unauthenticated Users via Spoofed Headers
Medium 5.3
In plain English
A medium-severity security flaw in vikunja from go-vikunja. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | code.vikunja.io/api | 2.2.0 | GHSA-m547-hp4w-j6jx |
| Go | code.vikunja.io/api | no fix listed | GO-2026-4791 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| go-vikunja | vikunja | >= 0.8, < 2.2.0 |
Weakness: CWE-807 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-m547-hp4w-j6jx x_refsource_CONFIRM
- https://vikunja.io/changelog/vikunja-v2.2.0-was-released x_refsource_MISC