{"id":"CVE-2026-104908","title":"MISP contains an improper input validation vulnerability in the decaying model import functionality","summary":"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 def…","severity":"high","cvss":7.1,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-285","CWE-915"],"vendor":"MISP","product":"MISP","affected":["MISP < 2.5.48"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T17:17:05.017","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104908","references":[{"url":"https://github.com/MISP/MISP/commit/70e319e4b","label":"5a6e4751-2f3f-4070-9419-94fb35b644e8"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-02T16:18:57.561492Z"},"cvssSource":"cna","ingestedAt":"2026-10-02T16:22:59.529Z","slug":"CVE-2026-104908","body":"## Overview\n\nMISP 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}