CVE-2026-56774mediumCWE-639

CVE-2026-56774: medium-severity vulnerability in kanboard

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

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 5.3epss 0.5%
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.
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
Affected products
kanboard · kanboard
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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