Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
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-
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4q
FAQ
What is CVE-2026-91972?
CVE-2026-91972 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2026-91972?
CVE-2026-91972 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-91972?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.