---
id: CVE-2026-4894
title: >-
  A vulnerability has been identified regarding insufficient validation in the
  Frappe Cloud/ERPNext authentication process, which allows multiple email
  addresses to be accepted by manipulating the email field in the
  /api/method/press.api.a…
summary: >-
  A vulnerability has been identified regarding insufficient validation in the
  Frappe Cloud/ERPNext authentication process, which allows multiple email
  addresses to be accepted by manipulating the email field in the
  /api/method/press.api.a…
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-290
vendor: Frappe Technologies
product: Frappe Technologies
affected:
  - frappe_technologies Version before 23/03/2026
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T09:16:41.477'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4894'
references:
  - url: >-
      https://www.incibe.es/en/incibe-cert/notices/aviso/authentication-bypass-multiple-products-frappe-technologies
    label: cve-coordination@incibe.es
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-08T09:24:18.120Z'
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-08T13:57:37.828083Z'
---

## Overview

A vulnerability has been identified regarding insufficient validation in the Frappe Cloud/ERPNext authentication process, which allows multiple email addresses to be accepted by manipulating the email field in the /api/method/press.api.account.signup endpoint. The vulnerability occurs when an unauthenticated remote attacker adds more than one email address.
The service processes the entire value as a valid list of recipients and sends the OTP code to all addresses without proper validation of all added emails (only one of them needs to be valid). Exploiting this vulnerability would allow an attacker to:

  *  Obtain the authentication OTP;
  *  Impersonate someone else in the registration process;
  *  Register accounts using other people's email addresses without access to the mailbox;
  *  Indirectly confirm the existence of already registered email addresses.

## Remediation

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