CVE-2026-105835

Description

PLANKA 2.2.0 through 2.2.1 fails to limit incorrect TOTP codes submitted to POST /api/access-tokens/verify-totp, allowing attackers to brute force two-factor authentication codes. Attackers who know a user's password can reuse the ten-minute pending token to guess six-digit codes until one succeeds, obtaining a full access token.

References

• https://github.com/plankanban/planka
• https://github.com/plankanban/planka/blob/v2.2.1/server/api/controllers/access-tokens/verify-totp.js
• https://github.com/plankanban/planka/commit/de4d7688317829e2a0b665fe9dbf39eaf127b6f9
• https://www.vulncheck.com/advisories/planka-2.2.0-through-2.2.1-totp-brute-force-via-verify-totp-endpoint