CVE-2025-54576

Observations on CVE-2025-54576 : OAuth2-Proxy versions up to 7.10.0 expose an authentication bypass when using skip_auth_routes with regex patterns, because skip_auth_routes can match the full request URI (path + query parameters) instead of only the path. This allows an attacker to craft URLs wi...

CVE-2020-11053

Summary: Vulnerability in OAuth2 Proxy prior to 5.1.1 allows an open redirect by bypassing redirect URL validation through HTML-encoded whitespace characters. This could let an attacker steer an authenticated user to an arbitrary URL after login. The issue is mitigated in version 5.1.1 by patchin...

CVE-2021-21291

CVE-2021-21291: OAuth2 Proxy (open-source reverse proxy) before v7.0.0 had a vulnerability in the whitelist-domain feature where a domain matched for redirects could be broader than intended (e.g., .example.com could match example.com and badexample.com). This could allow unintended redirects. Im...

CVE-2020-5233

CVE-2020-5233 affects the OAuth2 Proxy project (github.com/pusher/oauth2_proxy) prior to version 5.0, where an open redirect vulnerability exists in the redirect handling. The vulnerable component is the redirect/redirect URL validation path, enabling an attacker to silently harvest authenticatio...

CVE-2021-21411

OAuth2-Proxy suffered a vulnerability where the --gitlab-group flag for GitLab-group-based authorization stopped working in v7.0.0. Regardless of the flag, authorization wasn’t restricted and an authenticated user’s groups were added to X-Forwarded-Groups upstream. A bug caused the user session’s...

CVE-2026-41059

The CVE concerns OAuth2 Proxy (versions 7.5.0–7.15.1) where a configuration-driven authentication bypass can occur due to patterns in skip_auth_routes or legacy skip_auth_regex. Attacks are possible when attacker-controlled suffixes widen patterns (for example, ^/foo/.*/bar$) so that a # in the p...

CVE-2020-4037

CVE-2020-4037 concerns OAuth2 Proxy where versions 5.1.1 and older (up to 5.9.x) allow a user-supplied redirect URL at the end of the authentication flow. The redirect target is validated by the proxy, but the issue arises from insufficiently restricted redirects, potentially enabling open redire...

CVE-2017-1000069

The CVE-2017-1000069 entry describes a Cross-Site Request Forgery (CSRF) vulnerability in Bitly oauth2_proxy version 2.1 during the authentication flow. Connected documents corroborate CSRF as the vulnerability class affecting Bitly oauth2_proxy 2.1. The primary impact is reflected in the CVSS me...

CVE-2017-1000070

CVE-2017-1000070 concerns the Bitly oauth2_proxy showing an open redirect vulnerability in versions up to 2.1 during the start and end of the 2-legged OAuth flow. The root cause cited is improper input validation violating RFC-6819, allowing an attacker to redirect users to arbitrary sites. The c...

CVE-2026-40574

CVE-2026-40574 affects OAuth2 Proxy. Affected: deployments using email_domain restrictions. Issue: authorization bypass where an attacker can use a malformed multi-@ email claim (e.g., [email protected]@company.com) to satisfy a company.com domain check, even though the claim is not a valid email...

CVE-2026-40575

OAuth2 Proxy versions 7.5.0–7.15.1 can trust a client-supplied X-Forwarded-Uri when --reverse-proxy and at least one --skip-auth-regex/--skip-auth-route are configured, enabling header spoofing that makes authentication rules run against a different path. This can let an unauthenticated attacker ...

CVE-2026-34457

CVE-2026-34457 affects OAuth2 Proxy prior to 7.15.2. In deployments using an auth_request-style integration (e.g., nginx auth_request) with either --ping-user-agent or --gcp-healthchecks enabled, any request bearing the configured health-check User-Agent is treated as authenticated, bypassing log...

CVE-2026-34454

OAuth2 Proxy (oauth2-proxy) has a regression introduced in 7.11.0 where the session cookie is not cleared when rendering the sign-in page. This can allow a remaining authenticated session on the browser, particularly for logout flows that rely on the sign-in page. The issue is fixed in 7.15.2. De...