# 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.

- **Severity:** Medium 6.9 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Oct 2026
- **Updated:** 8 Oct 2026
- **Also known as:** GHSA-44qm-r6v9-65h7

## 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 (Authentication Bypass by Spoofing)

## 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.

## Is CVE-2026-4894 being exploited?

There is no known exploitation of CVE-2026-4894 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4894 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-4894 in the wild and no public exploit code.

Affected product: Frappe Technologies. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-4894/ (Markdown: https://insights.sbomify.com/CVE-2026-4894/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4894
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4894
- OSV: https://osv.dev/vulnerability/CVE-2026-4894

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4894/
Summaries are generated and may contain mistakes; the official description above is the record.