CVE-2026-34969
High
Description
Nhost is an open source Firebase alternative with GraphQL. Prior to 0.48.0, the auth service's OAuth provider callback flow places the refresh token directly into the redirect URL as a query parameter. Refresh tokens in URLs are logged in browser history, server access logs, HTTP Referer headers, and proxy/CDN logs. Note that the refresh token is one-time use and all of these leak vectors are on owned infrastructure or services integrated by the application developer. This vulnerability is fixed in 0.48.0.
SeverityHigh
CVSS7.5
Exploit probability—
ProductNhost\/auth
PublishedApr 6, 2026
First seenApr 6, 2026
Weakness typeCWE-200Sensitive information exposureCWE-598CWE-598
How to fix
Update
- nhost nhost\/auth0.48.0 or later
- github.com/nhost/nhost0.0.0-20260330133707-294954e0fc3a or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nhost nhost\/auth | v < 0.48.0 | 0.48.0 |
| github.com/nhost/nhostGo | v < 0.0.0-20260330133707-294954e0fc3a | 0.0.0-20260330133707-294954e0fc3a |
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