Vulnerability in Planka
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/plankanban/planka (product)
- github.com/plankanban/planka/blob/v2.2.1/server/api/controllers/access-tokens/v… (technical-description)
- github.com/plankanban/planka/commit/de4d7688317829e2a0b665fe9dbf39eaf127b6f9 (patch)
- www.vulncheck.com/advisories/planka-2.2.0-through-2.2.1-totp-brute-force-via-ve… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-105835?
- CVE-2026-105835 is a high-severity vulnerability in Planka, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.4/10. Published 2026-10-06.
- How severe is CVE-2026-105835?
- High severity. CVSS v3 base score is 7.4 out of 10.