PT-2026-52547 · Kanboard · Kanboard

George Chen · Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-56774

Mitre

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

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' Remember Me sessions. Attackers can enumerate sequential session IDs and mass-invalidate persistent login sessions of any user, including administrators, forcing re-authentication and causing denial of service.

Exploit

Fix

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-56774

Affected Products

Kanboard

References · 5

• 🔥 https://github.com/kanboard/kanboard/issues/5829 · Exploit
• https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-56774 · Security Note
• https://github.com/kanboard/kanboard/pull/5831 · Note
• https://vulncheck.com/advisories/kanboard-cross-user-deletion-of-persistent-login-sessions-via-unvalidated-session-id · Note