Authentication Bypass

github.com/oauth2-proxy/oauth2-proxy is vulnerable to an authentication bypass. The vulnerability is due to improper handling of health check User-Agent values in authrequest-style integrations when --ping-user-agent or --gcp-healthchecks is enabled, which allows an unauthenticated remote attacke...

CVE-2026-40575 OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing

OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0 through 7.15.1 may trust a client-supplied X-Forwarded-Uri header when --reverse-proxy is enabled and --skip-auth-regex or --skip-auth-route is configured. An attacker can spoof this header so OAut...

CVE-2026-40574 OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims

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 emaildomain enforcement option. An attacker may be able to authenticate with an email claim such as [email protected]@company.com and...

OAuth2 Proxy 安全漏洞

OAuth2 Proxy is a product offered by OAuth2 Proxy organizations that can provide a reverse proxy for authentication with Google, Github, or other providers. Versions of OAuth2 Proxy prior to 7.15.2 had security vulnerabilities. These vulnerabilities stemmed from the emaildomain enforcement option...

PT-2026-32955

Name of the Vulnerable Software and Affected Versions OAuth2 Proxy versions prior to 7.15.2 Description A configuration-dependent authentication bypass exists in deployments using auth request-style integration, such as nginx auth request. The issue occurs when either the --ping-user-agent variab...