Vulnerability in Oauth2-proxy
CVE-2026-40575
OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. Versions 7.5.0 through 7.15.1 may trust a client-supplied `X-Forwarded-Uri` header when `--reverse-proxy` is enabled and `--skip-auth-regex` or `--skip-au…
EPSS: 0.005 (38.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Oauth2-proxy — versions >= 7.5.0, < 7.15.2
- Oauth2_proxy_project Oauth2_proxy
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-40575?
- CVE-2026-40575 is a critical-severity vulnerability in Oauth2-proxy, classified under Authentication Bypass by Spoofing. CVSS score: 9.1/10. Published 2026-04-22.
- How severe is CVE-2026-40575?
- Critical severity. CVSS v3 base score is 9.1 out of 10.