CVE-2026-123521

EUVD-2026-119406
Vikunja before 2.7.1 contains an improper restriction of excessive authentication attempts vulnerability that allows session holders to brute-force account passwords via unthrottled re-authentication endpoints. Attackers with a stolen session can guess the password via /user/settings/totp/disable without lockout, then disable TOTP without a code for persistent account takeover.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 14.72%
Common Weakness Enumeration
References
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-49pj-52x6-8gpj
https://www.vulncheck.com/advisories/vikunja-before-2.7.1-password-brute-force-via-totp-disable-endpoint