CVE-2026-34969Nhost Leaks the Refresh Token via URL Query Parameter in OAuth Provider Callback
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 2.3 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
- Weakness (CWE)
- CWE-200, CWE-598
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Apr 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nhost nhost nhost:nhost (from the name) | before 0.48.0 | CNA record |
nhost nhost/auth nhost:nhost/auth | before 0.48.0 | NVD |
References
- https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9rx-refsource-confirm, exploit, mitigation, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.