Track vulnerabilities like this one. Sign up free to get alerted when software you use is affected.
9.1

Planka allows unlimited TOTP guesses, enabling account takeover

CVE-2026-105835 · published 4 days ago
Summary

Versions 2.2.0 through 2.2.1 of Planka let anyone who already knows a user's password keep trying six‑digit verification codes without any lockout. This means an attacker can eventually guess the correct code and gain full access to the account. Apply the latest Planka update or configure rate‑limiting on the verify‑totp endpoint to stop repeated attempts.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
planka planka <= 2.2.1
Original advisory text
PLANKA 2.2.0 through 2.2.1 TOTP Brute Force via verify-totp Endpoint
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
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.1 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-307Improper Restriction of Excessive Authentication Attempts
Timeline
Published6 Oct 2026
Updated9 Oct 2026
First seen6 Oct 2026
Sources
CVE-2026-105835 · NVD
CVE-2026-105835 · MITRE
CVE-2026-105835 · OSV
Track software like this
Free during beta