{"id":"CVE-2026-56774","title":"Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID","summary":"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' Remem…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","cvssSource":"cna","cwe":["CWE-639"],"vendor":"kanboard","product":"kanboard","affected":["kanboard <= 1.2.52"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-25T20:28:52.191725Z"},"exploitAvailable":true,"published":"2026-06-25","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:06:21.237Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56774","references":[{"url":"https://github.com/kanboard/kanboard/issues/5829","label":"Researcher Disclosure"},{"url":"https://github.com/kanboard/kanboard/pull/5831","label":"Pull Request"},{"url":"https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/kanboard-cross-user-deletion-of-persistent-login-sessions-via-unvalidated-session-id"}],"tags":["cve.org","exploit-available"],"epss":0.00477,"epssPercentile":0.41455,"ingestedAt":"2026-11-08T14:51:22.337Z","slug":"CVE-2026-56774","body":"## Overview\n\nKanboard 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.\n\n## Affected\n\n- `kanboard <= 1.2.52`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}