---
id: CVE-2026-91819
title: >-
  Affected versions of MISP rely on CakePHP request-method override processing
  in a way that can disable CSRF and form-security validation.


  CakePHP honors a _method field or X-HTTP-Method-Override header by rewriting
  the effective request…
summary: >-
  Affected versions of MISP rely on CakePHP request-method override processing
  in a way that can disable CSRF and form-security validation.


  CakePHP honors a _method field or X-HTTP-Method-Override header by rewriting
  the effective request…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-20
  - CWE-352
vendor: MISP
product: MISP
affected:
  - MISP < 2.5.46
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T13:42:48.930'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91819'
references:
  - url: 'https://github.com/MISP/MISP/commit/29af008c4'
    label: 5a6e4751-2f3f-4070-9419-94fb35b644e8
tags:
  - nvd
  - cve.org
epss: 0.00198
epssPercentile: 0.08558
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T14:33:06.680786Z'
cvssSource: cna
ingestedAt: '2026-09-15T08:34:10.545Z'
---

## Overview

Affected versions of MISP rely on CakePHP request-method override processing in a way that can disable CSRF and form-security validation.

CakePHP honors a _method field or X-HTTP-Method-Override header by rewriting the effective request method. For override values outside the normal write verbs POST, PUT, PATCH, and DELETE, CakePHP also clears the parsed request body. MISP’s security component then determines whether to perform _validatePost() and _validateCsrf() based on whether request data remains. With a value such as:


_method=GET

the body becomes empty before those checks run, so both protections are skipped. A cross-site form containing only that override can therefore reach actions whose parameters are taken from the URL rather than the request body

Version affected: ≤2.5.45

## Remediation

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