CVE-2026-34969

HIGH

Nhost Leaks the Refresh Token via URL Query Parameter in OAuth Provider Callback

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0027
EPSS Percentile 18.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-200 CWE-598
Status published
Products (3)
nhost/nhost 0 - 0.0.0-20260330133707-294954e0fc3aGo
nhost/nhost < 0.48.0
nhost/nhost\/auth < 0.48.0
Published Apr 06, 2026
Tracked Since Apr 06, 2026