{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.2.52"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1a9a32da1118a095325ecec50d4c0a784dcd46f8"
            },
            {
              "fixed": "928c68aa2b7c00092dd71084d329b912e229f3d1"
            }
          ],
          "repo": "https://github.com/kanboard/kanboard",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56774.json"
  },
  "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.",
  "id": "CVE-2026-56774",
  "modified": "2026-07-08T05:37:45.398257258Z",
  "published": "2026-06-25T18:10:22.017Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56774.json"
    },
    {
      "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"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kanboard/kanboard/pull/5831"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kanboard/kanboard/commit/928c68aa2b7c00092dd71084d329b912e229f3d1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kanboard/kanboard"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/kanboard/kanboard/issues/5829"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kanboard - Cross-User Deletion of Persistent Login Sessions via Unvalidated Session ID"
}