CVE-2026-4894 Authentication bypass in multiple products from Frappe Technologies
Attackers can bypass email validation during registration to obtain OTPs, impersonate users, and register accounts using others' email addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4894?
CVE-2026-4894 is a medium-severity authentication bypass vulnerability in Frappe Technologies, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2026-4894?
How do I fix CVE-2026-4894?
No fix has been published for CVE-2026-4894 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-4894 being exploited?
There is no known exploitation of CVE-2026-4894 in the wild and no public exploit code.
Sources
Also known as GHSA-44qm-r6v9-65h7.