CVE-2026-91982

Vikunja before 2.6.0 continues to expose the raw TOTP shared secret after enrollment through the GET /api/v1/user/settings/totp and /api/v1/user/settings/totp/qrcode endpoints without re-authentication. Attackers with a valid access token can read the secret, import it into their own authenticator, and generate valid codes indefinitely to defeat the second factor and enable account takeover.

• https://github.com/go-vikunja/vikunja/security/advisories/GHSA-88f6-4rjv-x774
• https://www.vulncheck.com/advisories/vikunja-before-2.6.0-totp-secret-disclosure-via-api