Medium severity5.9NVD Advisory· Published Nov 8, 2026· Updated Nov 8, 2026

CVE-2026-123521

Description

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Go Vikunja/Vikunjallm-fuzzy
Range: <2.7.1

Patches

Vulnerability mechanics

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-49pj-52x6-8gpjnvd
www.vulncheck.com/advisories/vikunja-before-2.7.1-password-brute-force-via-totp-disable-endpointnvd

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cvss	0.384
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000