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CVE-2026-56774

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

Published: Jun 25, 2026Updated: Jul 14, 2026 Sources: CVE List NVDCWE-639
5.4MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 60.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-639

Affected Products

kanboard
oss-projectaka kanban board
kanboardOn-prem
Enterprise Software / collaboration-groupware

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

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
github.com
and 1 more references View all →

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