How severe is CVE-2026-34969?

CVE-2026-34969 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-34969 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34969?

CVE-2026-34969 affects Nhost Nhost/auth. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34969?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34969 have an EU (EUVD) identifier?

Yes. CVE-2026-34969 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19358.

When was CVE-2026-34969 published?

CVE-2026-34969 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-34969

CVE-2026-34969 is a high-severity vulnerability in Nhost Nhost/auth with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 2.3
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19358
Weakness: CWE-200
Affected product: Nhost Nhost/auth
Published: 2026-04-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-34969?: CVE-2026-34969 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-34969 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34969?: CVE-2026-34969 affects Nhost Nhost/auth. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34969?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34969 have an EU (EUVD) identifier?: Yes. CVE-2026-34969 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19358.
When was CVE-2026-34969 published?: CVE-2026-34969 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/nhost/nhost/security/advisories/GHSA-g2qj-prgh-4g9r

Affected products (1)

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

More vulnerabilities in Nhost Nhost/auth

CVE-2026-41574 — Critical (CVSS 9.8): Nhost is an open source Firebase alternative with GraphQL. Prior to version 0.49.1, Nhost automatically links an…

All CVEs affecting Nhost Nhost/auth →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →