{"api_version":"1","generated_at":"2026-06-23T01:45:38+00:00","cve":"CVE-2026-56424","urls":{"html":"https://cve.report/CVE-2026-56424","api":"https://cve.report/api/cve/CVE-2026-56424.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-56424","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-56424"},"summary":{"title":"Broken access control in MISP core allows cross-organization unauthorized modification or deletion of analyst data, event reports, collections, templates, and decaying models","description":"MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.\n\n\nThe affected paths included:\n\n  *  Event Reports tag removal: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report\n\n\n\n\n  *  Collection Elements bulk deletion: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.\n  *  Analyst Data capture/update: nested analyst data updates could overwrite an existing record without applying the normal canEditAnalystData ownership check, enabling cross-organization overwrite of analyst data records.\n  *  Template Elements editing: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.\n  *  Decaying Model editing and mappings: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization. \n\n\n\n\n\n\n\n\nSuccessful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows.","state":"PUBLISHED","assigner":"CIRCL","published_at":"2026-06-22 14:17:50","updated_at":"2026-06-22 17:50:45"},"problem_types":["CWE-639","CWE-862","CWE-863","CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key","CWE-863 CWE-863 Incorrect 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developer","value":"Andras Iklody"},{"lang":"en","type":"analyst","value":"Jeroen Pinoy"},{"lang":"en","type":"tool","value":"Claude (the international export version)"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.</p><br><p>The affected paths included:</p><ul><li><p><strong>Event Reports tag removal</strong>: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report</p></li></ul><ul><li><strong>Collection Elements bulk deletion</strong><span style=\"background-color: rgb(255, 255, 255);\">: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.</span></li><li><span style=\"background-color: rgb(255, 255, 255);\"><strong>Analyst Data capture/update</strong><span style=\"background-color: rgb(255, 255, 255);\">: nested analyst data updates could overwrite an existing record without applying the normal </span><code>canEditAnalystData</code><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;ownership check, enabling cross-organization overwrite of analyst data records.</span></span></li><li><span style=\"background-color: rgb(255, 255, 255);\"><strong>Template Elements editing</strong><span style=\"background-color: rgb(255, 255, 255);\">: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.</span></span></li><li><span style=\"background-color: rgb(255, 255, 255);\"><strong>Decaying Model editing and mappings</strong><span style=\"background-color: rgb(255, 255, 255);\">: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization.&nbsp;</span></span></li></ul><div><br></div><div><br></div><span style=\"background-color: rgb(255, 255, 255);\">Successful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows.</span><br><span style=\"background-color: rgb(255, 255, 255);\"><br></span>"}],"value":"MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.\n\n\nThe affected paths included:\n\n  *  Event Reports tag removal: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report\n\n\n\n\n  *  Collection Elements bulk deletion: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.\n  *  Analyst Data capture/update: nested analyst data updates could overwrite an existing record without applying the normal canEditAnalystData ownership check, enabling cross-organization overwrite of analyst data records.\n  *  Template Elements editing: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.\n  *  Decaying Model editing and mappings: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization. \n\n\n\n\n\n\n\n\nSuccessful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows."}],"impacts":[{"capecId":"CAPEC-115","descriptions":[{"lang":"en","value":"CAPEC-115 Authentication 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access control in MISP core allows cross-organization una","CVE":"CVE-2026-56424","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"56424","Ordinal":"1","NoteData":"MISP core contained multiple broken access-control flaws where authorization checks were performed against the wrong entity, or where ownership/editability checks were missing on write paths. In affected subsystems, a lower-privileged authenticated user with the relevant feature permission could cause the application to authorize one object but mutate another, or could modify objects that were merely visible rather than editable by the user’s organization.\n\n\nThe affected paths included:\n\n  *  Event Reports tag removal: the route-authorized report could differ from the report ID used for tag detachment, enabling cross-organization tag removal from another event report\n\n\n\n\n  *  Collection Elements bulk deletion: bulk deletion authorized against a collection whose ID matched the collection-element row ID, rather than the element’s actual parent collection, enabling deletion of elements from collections the user did not own.\n  *  Analyst Data capture/update: nested analyst data updates could overwrite an existing record without applying the normal canEditAnalystData ownership check, enabling cross-organization overwrite of analyst data records.\n  *  Template Elements editing: editing authorized against a template whose ID matched the template-element ID, rather than the element’s actual parent template, enabling unauthorized edits to another organization’s template elements.\n  *  Decaying Model editing and mappings: write paths loaded models using view-scope access but did not verify edit ownership, enabling users to edit or remap visible models owned by another organization. \n\n\n\n\n\n\n\n\nSuccessful exploitation could allow an authenticated user with subsystem-specific permissions to perform unauthorized cross-organization modifications or deletions of MISP data, resulting in integrity loss, unauthorized tampering with shared intelligence, and disruption of analyst workflows.","Type":"Description","Title":"Broken access control in MISP core allows cross-organization una"}]}}}