{"id":"CVE-2026-104908","published":"2026-10-02T16:16:48.580","lastModified":"2026-10-02T17:17:05.017","description":"MISP contains an improper input validation vulnerability in the decaying model import functionality. The import endpoint was intended to create a new decaying model belonging exclusively to the importing user's organisation, with the default flag forced to off.\n\nHowever, the application stripped only the top-level id and uuid fields and pinned org_id and default on the outer array before saving the data flat. A user with decaying-model permissions could supply a nested model key carrying its own primary key, organisation identifier, and default flag, which bypassed those guards during the save operation.\n\nImpact:\n\n- A user with perm_decaying could overwrite an existing decaying model belonging to another organisation in place, altering its name, formula, parameters, or ownership.\n\n- A user could create or modify a model flagged as the organisation default, affecting scoring behaviour for other users.\n\n- A user could reassign a model's organisation to an arbitrary value.\n\nPreconditions:\n\n- Authenticated user with decaying-model permission (perm_decaying).\n\n- Network access to the MISP instance.\n\nAffected: <2.5.48.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-285","CWE-915"],"vendors":[],"products":[],"references":[{"url":"https://github.com/MISP/MISP/commit/70e319e4b","tags":[]}],"exploitRefs":[{"url":"https://github.com/MISP/MISP/commit/70e319e4b","tags":[]}],"hasPoc":true,"ai":null}