---
id: CVE-2026-94379
title: >-
  The login() function in MISP's UsersController.php contained insufficient HTTP
  method validation for several security-critical code paths
summary: >-
  The login() function in MISP's UsersController.php contained insufficient HTTP
  method validation for several security-critical code paths. The original code
  used an allowlist approach, checking only for specific HTTP methods (POST and
  PU…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-20
  - CWE-285
vendor: MISP
product: MISP
affected:
  - MISP >= unspecified < 2.5.47
published: '2026-09-21'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T16:17:30.397'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94379'
references:
  - url: 'https://github.com/MISP/MISP/commit/ef4dc19c6'
    label: 5a6e4751-2f3f-4070-9419-94fb35b644e8
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-21T15:20:43.610267Z'
cvssSource: cna
ingestedAt: '2026-09-21T13:37:22.827Z'
epss: 0.00578
epssPercentile: 0.45265
---

## Overview

The login() function in MISP's UsersController.php contained insufficient HTTP method validation for several security-critical code paths. The original code used an allowlist approach, checking only for specific HTTP methods (POST and PUT) before enforcing bruteforce protection, email one-time-password (OTP) verification, and login-failure logging. Because the checks were not exhaustive, an unauthenticated attacker could issue login requests using other HTTP methods and bypass all three security controls simultaneously. Specifically: 

 - the bruteforce blocklisting check and attempt counter were skipped, allowing unlimited credential-guessing attempts without being rate-limited or blocked
 -  the email OTP two-factor authentication step was skipped, defeating the second factor of authentication
 - login-failure events were neither logged nor counted, removing the audit trail and the mechanism that would normally trigger a blocklist entry.




The security impact is the effective disabling of brute-force protection and multi-factor authentication for any attacker who can craft an HTTP request with a non-POST/PUT method to the login endpoint, potentially leading to credential compromise and unauthorized access to the MISP instance.





Version affected: <2.5.47

## Remediation

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