CVE-2026-56774CWE-639

Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID

Medium · published June 25, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
40.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS
0.00477 · 40.2th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-06-25T18:10Z
EPSS history
Timeline
  • 25 JUN 18:10Z
    Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID
    cvelistv5