---
title: "CVE-2026-41574: Nhost Vulnerable to Account Takeover via OAuth Email Verification Bypass"
url: https://erroneo.us/security/cve/CVE-2026-41574/
description: "CVE-2026-41574 (github.com/nhost/nhost (Go)): Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.49.1, Nhost automatically links…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-08
date_modified: 2026-05-14
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-41574"
kev: false
cvss: 9.3
epss: 0.00905
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-41574: Nhost Vulnerable to Account Takeover via OAuth Email Verification Bypass

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 59: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 59% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes github.com/nhost/nhost (Go) < 0.0.0-20260417112436-ec8dab3f2cf4, fixed in 0.0.0-20260417112436-ec8dab3f2cf4 . Check your lockfile, including transitive dependencies.

## What it is

Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.49.1, Nhost automatically links an incoming OAuth identity to an existing Nhost account when the email addresses match. This is only safe when the email has been verified by the OAuth provider. Nhost's controller trusts a profile.EmailVerified boolean that is set by each provider adapter. The vulnerability is that several provider adapters do not correctly populate this field they either silently drop a verified field the provider API actually returns (Discord), or they fall back to accepting unconfirmed emails and marking them as verified (Bitbucket). Two Microsoft providers (AzureAD, EntraID) derive the email from non-ownership-proving fields like the user principal name, then mark it verified. The result is that an attacker can present an email they don't own to Nhost, have the OAuth identity merged into the victim's account, and receive a full authenticated session. This issue has been patched in version 0.49.1.

## Affected packages

- Go `github.com/nhost/nhost` < 0.0.0-20260417112436-ec8dab3f2cf4 → fixed: 0.0.0-20260417112436-ec8dab3f2cf4

## Affected products (CVE record)

- nhost nhost: < 0.49.1

## Severity

- GitHub_M CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.91% probability of exploitation activity in the next 30 days; percentile 59.

## Sources

- [GitHub Advisory GHSA-6g38-8j4p-j3pr](https://github.com/advisories/GHSA-6g38-8j4p-j3pr)
- [CVE.org record CVE-2026-41574](https://www.cve.org/CVERecord?id=CVE-2026-41574)
- [NVD entry CVE-2026-41574](https://nvd.nist.gov/vuln/detail/CVE-2026-41574)
- [github.com](https://github.com/nhost/nhost/security/advisories/GHSA-6g38-8j4p-j3pr)
- [github.com](https://github.com/nhost/nhost/pull/4162)
- [github.com](https://github.com/nhost/nhost/commit/ec8dab3f2cf46e1131ddaf893d56c37aa00380b2)
- [github.com](https://github.com/nhost/nhost/releases/tag/auth%400.49.1)

---
Source page: https://erroneo.us/security/cve/CVE-2026-41574/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt