OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-40575 · Microsoft / collected KEV context

CVE-2026-76835 · Microsoft / collected KEV context

EUVD-2026-24557

EUVD-2026-65061

GHSA-vvqv-7vrf-88vh

GHSA-7x63-xv5r-3p2x

BIT-oauth2-proxy-2026-40575

BIT-oauth2-proxy-2026-76835

GO-2026-5236

cve-program · CVE-2026-40575

• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x

cve-program · CVE-2026-76835

• https://github.com/oauth2-proxy/oauth2-proxy
• https://github.com/oauth2-proxy/oauth2-proxy/issues/3506
• https://github.com/oauth2-proxy/oauth2-proxy/blob/v7.15.4/pkg/apis/middleware/scope.go
• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x
• https://www.vulncheck.com/advisories/oauth2-proxy-through-authentication-bypass-via-x-forwarded-uri-under-the-default-trusted-proxy-set

euvd · EUVD-2026-24557

• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x

euvd · EUVD-2026-65061

• https://github.com/oauth2-proxy/oauth2-proxy
• https://github.com/oauth2-proxy/oauth2-proxy/issues/3506
• https://github.com/oauth2-proxy/oauth2-proxy/blob/v7.15.4/pkg/apis/middleware/scope.go
• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x
• https://www.vulncheck.com/advisories/oauth2-proxy-through-authentication-bypass-via-x-forwarded-uri-under-the-default-trusted-proxy-set

nvd · CVE-2026-40575

• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x
• https://access.redhat.com/security/cve/CVE-2026-40575
• https://bugzilla.redhat.com/show_bug.cgi?id=2460449
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40575.json

nvd · CVE-2026-76835

• https://github.com/oauth2-proxy/oauth2-proxy
• https://github.com/oauth2-proxy/oauth2-proxy/blob/v7.15.4/pkg/apis/middleware/scope.go
• https://github.com/oauth2-proxy/oauth2-proxy/issues/3506
• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x
• https://www.vulncheck.com/advisories/oauth2-proxy-through-authentication-bypass-via-x-forwarded-uri-under-the-default-trusted-proxy-set

osv · GHSA-7x63-xv5r-3p2x

• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x
• https://nvd.nist.gov/vuln/detail/CVE-2026-40575
• https://access.redhat.com/security/cve/CVE-2026-40575
• https://bugzilla.redhat.com/show_bug.cgi?id=2460449
• https://github.com/oauth2-proxy/oauth2-proxy
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40575.json

osv · GO-2026-5236

• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x
• https://nvd.nist.gov/vuln/detail/CVE-2026-40575

No related operational record is retained in the current change model.