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CVE-2026-34457 - Vulnerability Analysis

CriticalCVSS: 9.1

Last Updated: April 14, 2026

OAuth2 Proxy - Authentication Bypass

Published: April 14, 2026Updated: April 14, 2026Remote Exploitable

Overview

OAuth2 Proxy < 7.15.2 contains an authentication bypass caused by misconfiguration with auth_request-style integration and enabled --ping-user-agent or --gcp-healthchecks, letting unauthenticated remote attackers access protected resources.

Severity & Score

Severity: Critical

CVSS Score: 9.1

Impact

Unauthenticated remote attackers can bypass authentication to access protected upstream resources.

Mitigation

Upgrade to version 7.15.2 or later.

References

https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.15.2
https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-5hvv-m4w4-gf6v

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-34457
Severity: Critical
CVSS Score: 9.1
Type: broken_authentication
Status: new

CWE

CWE-290

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N