{"id":"CVE-2026-56774","summary":"Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID","details":"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.","modified":"2026-06-26T04:11:18.535983005Z","published":"2026-06-25T18:10:22.017Z","database_specific":{"cna_assigner":"VulnCheck","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56774.json","cwe_ids":["CWE-639"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56774.json"},{"type":"PACKAGE","url":"https://github.com/kanboard/kanboard"},{"type":"FIX","url":"https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1"},{"type":"EVIDENCE","url":"https://github.com/kanboard/kanboard/issues/5829"},{"type":"REPORT","url":"https://github.com/kanboard/kanboard/pull/5831"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56774"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/kanboard-cross-user-deletion-of-persistent-login-sessions-via-unvalidated-session-id"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kanboard/kanboard","events":[{"introduced":"0"},{"last_affected":"1a9a32da1118a095325ecec50d4c0a784dcd46f8"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"1.2.52"}]}}],"versions":["v1.2.52","v1.2.51","v1.2.50","v1.2.49","v1.2.47","v1.2.46","v1.2.45","v1.2.44","v1.2.43","v1.2.42","v1.2.41","v1.2.40","v1.2.39","v1.2.38","v1.2.37","v1.2.36","v1.2.35","v1.2.34","v1.2.33","v1.2.32","v1.2.31","v1.2.30","v1.2.29","v1.2.28","v1.2.27","v1.2.26","v1.2.25","v1.2.24","v1.2.23","v1.2.22","v1.2.21","v1.2.20","v1.2.19","v1.2.18","v1.2.17","v1.2.16","v1.2.15","v1.2.14","v1.2.13","v1.2.12","v1.2.11","v1.2.10","v1.2.9","v1.2.8","v1.2.7","v1.2.6","v1.2.5","v1.2.4","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.1","v1.1.0","v1.0.48","v1.0.46","v1.0.45","v1.0.44","v1.0.43","v1.0.42","v1.0.41","v1.0.40","v1.0.39","v1.0.38","v1.0.37","v1.0.36","v1.0.35","v1.0.34","v1.0.33","v1.0.32","v1.0.31","v1.0.30","v1.0.29","v1.0.28","v1.0.27","v1.0.26","v1.0.20","v1.0.19","v1.0.18","v1.0.17","v1.0.16","v1.0.15","v1.0.14","v1.0.13","v1.0.12","v1.0.11","v1.0.10","v1.0.9","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-56774.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}