User-Agent Spoofing

Critical 9.1 Bypass in OAuth2 Proxy Exposes Upstream Resources

OAuth2 Proxy Auth Bypass CVE-2026-34457 OAuth2-Proxy, Authentication Bypass

Critical 9.1 Bypass in OAuth2 Proxy Exposes Upstream Resources

Do Son April 16, 2026

A critical 9.1 CVSS flaw in OAuth2 Proxy allows unauthenticated users to bypass security via User-Agent spoofing. Secure your upstream apps—patch v7.15.2 today.

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