by Kastro
Paper/Archive/CVE-2026-105835

CVE-2026-105835

planka planka — PLANKA 2.2.0 through 2.2.1 TOTP Brute Force via verify-totp Endpoint

EPSS 0.3%CVSS 9.1
critical.is priorityof 100
32
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 24.6.246 × 204.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
planka2.2.0 – 2.2.1–CNA

Scores by source

VulnCheck (CNA)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
VulnCheck (CNA)7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchgithub.com/plankanban/planka/commit/de4d7688317829e2a0b665fe9dbf39eaf127b6f9writeupgithub.com/plankanban/planka/blob/v2.2.1/server/api/controllers/access-tokens/verify-totp.jsrefgithub.com/plankanban/plankawriteupvulncheck.com/advisories/planka-2.2.0-through-2.2.1-totp-brute-force-via-verify-totp-endpoint