What is CVE-2026-56774?

CVE-2026-56774 is a medium-severity vulnerability in Kanboard, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-06-25.

How severe is CVE-2026-56774?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Kanboard

CVE-2026-56774

Kanboard through 1.2.52, fixed in commit 928c68a, UserViewController::removeSession fails to validate the session id parameter before passing it to RememberMeSessionModel::remove, allowing authenticated users to delete other users' Remembe…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Kanboard — versions 0, 928c68aa2b7c00092dd71084d329b912e229f3d1

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56774?: CVE-2026-56774 is a medium-severity vulnerability in Kanboard, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-06-25.
How severe is CVE-2026-56774?: Medium severity. CVSS v3 base score is 5.4 out of 10.