cvedb.io
CVE-2026-40574
MEDIUM · CVSS 6.8
EPSS exploitation probability: 0%
Published 2026-04-21T17:16:55.730 · Last modified 2026-06-17T10:45:28.563

Summary

OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Prior to 7.15.2, an authorization bypass exists in OAuth2 Proxy as part of the email_domain enforcement option. An attacker may be able to authenticate with an email claim such as [email protected]@company.com and satisfy an allowed domain check for company.com, even though the claim is not a valid email address. The issue ONLY affects deployments that rely on email_domain restrictions and accept email claim values from identity providers or claim mappings that do not strictly enforce normal email syntax. This vulnerability is fixed in 7.15.2.

Affected products

oauth2_proxy_project — oauth2_proxy

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.