{"id":"CVE-2026-104908","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104908","generatedAt":"2026-10-28T00:59:27.200Z","title":"MISP contains an improper input validation vulnerability in the decaying model import functionality.","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.","published":"2026-10-02T16:16:49.000Z","lastModified":"2026-10-02T17:17:05.000Z","status":"Deferred","sourceIdentifier":"5a6e4751-2f3f-4070-9419-94fb35b644e8","cvss":{"version":"4.0","score":7.1,"severity":"HIGH","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-285","CWE-915"],"affected":[],"epss":{"score":0.00287,"percentile":0.21035,"date":"2026-10-26","history":[{"date":"2026-10-03","score":0.00287,"percentile":0.19263}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-02T16:16:49.000Z","detail":{"score":"7.1","severity":"HIGH","publishedAt":"2026-10-02T16:16:48.580Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://github.com/MISP/MISP/commit/70e319e4b","source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104908","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}