CVE-2026-123521 Vikunja before 2.7.1 Password Brute-Force via TOTP Disable Endpoint
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-123521?
CVE-2026-123521 is a medium-severity vulnerability in go-vikunja vikunja, published on 8 Nov 2026.
Official 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.
Weakness: CWE-307
Which versions are affected by CVE-2026-123521?
How do I fix CVE-2026-123521?
No fix has been published for CVE-2026-123521 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-123521 being exploited?
There is no known exploitation of CVE-2026-123521 in the wild and no public exploit code.
Sources
Also known as GHSA-49pj-52x6-8gpj, GHSA-8h95-jvr5-q5cg.