CVEvulnerability

CVE-2026-34457

9.1 CRITICAL Published 2026-04-14 Modified 2026-07-24 Official page ↗
Status
Analyzed
Published
2026-04-14
Last modified
2026-07-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-290

Description

OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions prior to 7.15.2 contain a configuration-dependent authentication bypass in deployments where OAuth2 Proxy is used with an auth_request-style integration (such as nginx auth_request) and either --ping-user-agent is set or --gcp-healthchecks is enabled. In affected configurations, OAuth2 Proxy treats any request with the configured health check User-Agent value as a successful health check regardless of the requested path, allowing an unauthenticated remote attacker to bypass authentication and access protected upstream resources. Deployments that do not use auth_request-style subrequests or that do not enable --ping-user-agent/--gcp-healthchecks are not affected. This issue is fixed in 7.15.2.

Affected configurations

• oauth2 proxy project oauth2 proxy (< 7.15.2)

Related

Weakness · CWE (1)

  • CWE-290 Authentication Bypass by Spoofing weakness

References