CVE-2026-4894— Authentication bypass in multiple products from Frappe Technologies
Quick assessment
Affected
Frappe Technologies Frappe Technologies
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Frappe Cloud / ERPNext 的认证过程中发现了一个因验证不足导致的安全漏洞。该漏洞允许攻击者通过篡改 接口中的邮箱字段，传入多个电子邮件地址，从而绕过正常的邮箱验证机制。 当未经身份验证的远程攻击者在请求中提交多个邮箱地址时，系统会将整个值当作合法收件人列表进行处理，并向所有提供的邮箱地址发送一次性验证码（OTP），而未对每一个邮箱进行充分验证（只需其中至少一个邮箱有效即可）。 利用此漏洞，攻击者可能实现以下恶意行为： 获取认证所需的 OTP 验证码； 在注册过程中冒充他人身份； 使用他人的邮
Possible ATT&CK Techniques 3 AI
T1556 · Modify Authentication Process T1078 · Valid Accounts T1098 · Account Manipulation
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I. Basic Information for CVE-2026-4894
Vulnerability Information
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Vulnerability Title
Authentication bypass in multiple products from Frappe Technologies
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Frappe Technologies | Frappe Technologies | Version before 23/03/2026 | - |
|
II. Public POCs for CVE-2026-4894
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-4894 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-4894
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