Description
Vikunja versions before 2.6.0 fail to apply rate limiting to /api/v2 public authentication endpoints including login, register, password-reset, and OAuth token routes. Remote unauthenticated attackers can perform unbounded credential guessing, account enumeration, and password-reset flooding attacks without throttling restrictions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| go-vikunja | vikunja | < 2.6.0 | 2.6.0 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | code.vikunja.io/api | < 2.6.0 | 2.6.0 | GHSA-6rvj-qwjf-3m4q |
| Go | code.vikunja.io/api | all versions | — | GO-2026-6721 |
References
- GitHub Security Advisory (GHSA-6rvj-qwjf-3m4q) vendor-advisory
- VulnCheck Advisory: Vikunja before 2.6.0 Authentication Bypass via Unthrottled API third-party-advisory