CVE-2026-34969

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r	Exploit Mitigation Vendor Advisory
https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nhost:nhost\/auth:*:*:*:*:*:*:*:*

History

22 Apr 2026, 20:16

Type	Values Removed	Values Added
References	~~() https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r -~~	() https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r - Exploit, Mitigation, Vendor Advisory
CPE		cpe:2.3:a:nhost:nhost\/auth::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
First Time		Nhost Nhost nhost\/auth

07 Apr 2026, 17:16

Type	Values Removed	Values Added
References	~~() https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r -~~	() https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r -

06 Apr 2026, 16:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-06 16:16

Updated : 2026-06-17 10:39

NVD link : CVE-2026-34969

Mitre link : CVE-2026-34969

CVE.ORG link : CVE-2026-34969

JSON object : View

Products Affected

nhost

nhost\/auth

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-598

Use of GET Request Method With Sensitive Query Strings

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