CVE-2026-91972
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| go-vikunja | vikunja | 0 < 2.6.0 | affected |
| go-vikunja | vikunja | 2.6.0 | unaffected |
Weaknesses
- CWE-307: Improper Restriction of Excessive Authentication Attempts
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4q
- https://www.vulncheck.com/advisories/vikunja-before-2.6.0-authentication-bypass-via-unthrottled-api
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