---
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'
---

## Overview

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.

However, 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.

Impact:

- A user with perm_decaying could overwrite an existing decaying model belonging to another organisation in place, altering its name, formula, parameters, or ownership.

- A user could create or modify a model flagged as the organisation default, affecting scoring behaviour for other users.

- A user could reassign a model's organisation to an arbitrary value.

Preconditions:

- Authenticated user with decaying-model permission (perm_decaying).

- Network access to the MISP instance.

Affected: <2.5.48.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.