CVE-2026-29794 Vikunja has Rate-Limit Bypass for Unauthenticated Users via Spoofed Headers
Attackers can bypass rate limits by spoofing IP headers, enabling unlimited requests for brute-force attacks against unauthenticated endpoints.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-29794?
CVE-2026-29794 is a medium-severity vulnerability in go-vikunja vikunja, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-807
Which versions are affected by CVE-2026-29794?
3 open source packages ship an affected version, including code.vikunja.io/api. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
code.vikunja.io/api Go | All versions | None |
code.vikunja.io/api Go | From 0.8 | 2.2.0 |
code.vikunja.io/api Go | From 0.8 | 2.2.0 |
Products include Vikunja Vikunja.
How do I fix CVE-2026-29794?
Upgrade code.vikunja.io/api to 2.2.0 or later.
Is CVE-2026-29794 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29794 exists.
Other vulnerabilities in go-vikunja vikunja
- CVE-2026-28268 Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse
- CVE-2026-27575 Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change
- CVE-2026-25935 Vikunja Affected by XSS Via Task Preview
- CVE-2026-35595 Vikunja Affected by Privilege Escalation via Project Reparenting
- CVE-2026-33316 Vikunja’s Improper Access Control Enables Bypass of Administrator-Imposed Account Disablement
Sources
Also known as GHSA-m547-hp4w-j6jx, GO-2026-4791.