CVE-2026-105835

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.

CVSS 4.0

9.1CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-25)

CWE

CWE-307

Published

2026-10-06

Modified

2026-10-09

Record from

the NVD, synced 2026-10-19

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

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