High severity7.5NVD Advisory· Published Sep 15, 2026

CVE-2026-91972

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

Go Vikunja/Vikunjallm-fuzzy
Range: <2.6.0

Patches

Vulnerability mechanics

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4qnvd
www.vulncheck.com/advisories/vikunja-before-2.6.0-authentication-bypass-via-unthrottled-apinvd

News mentions

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cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000