CVE-2026-34457
OAuth2 Proxy: Health Check User-Agent Matching Bypasses Authentication in auth_request Mode
描述
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.
如何修補 CVE-2026-34457
要修補 CVE-2026-34457,請將受影響套件升級到下列已修補版本。
- —升級至 7.15.2 或更新版本
- —未列出修補版本
- —未列出修補版本
- —升級至 7.15.2 或更新版本
- —升級至 7.15.2 或更新版本
CVE-2026-34457 正在被利用嗎?
低 — EPSS 為 0.5%,目前沒有觀察到大規模利用活動。
受影響套件(5)
- from 0, < 7.15.2
- from 0, <= 3.2.0
- from 0
- from 0, < 7.15.2
- from 0, < 7.15.2
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |