CVE-2026-56774
Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | kanboard |
| Product | kanboard |
| Published | Jun 25, 2026 |
| Last Updated | Jun 25, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
kanboard / kanboard
0 ≤ 1.2.52
References
github.com: https://github.com/kanboard/kanboard/issues/5829 github.com: https://github.com/kanboard/kanboard/pull/5831 github.com: https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1 vulncheck.com: https://www.vulncheck.com/advisories/kanboard-cross-user-deletion-of-persistent-login-sessions-via-unvalidated-session-id
Credits
George Chen