{"id":"GHSA-7x63-xv5r-3p2x","revision":null,"records":[{"revision":"80787ef47d81472d9b5efa2e712fc1fa","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-40575","aliases":[],"title":"OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing","description":"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-auth-route` is configured. An attacker can spoof this header so OAuth2 Proxy evaluates authentication and skip-auth rules against a different path than the one actually sent to the upstream application. This can result in an unauthenticated remote attacker bypassing authentication and accessing protected routes without a valid session. Impacted users are deployments that run oauth2-proxy with `--reverse-proxy` enabled and configure at least one `--skip-auth-regex` or `--skip-auth-route` rule. This issue is patched in `v7.15.2`. Some workarounds are available for those who cannot upgrade immediately. Strip any client-provided `X-Forwarded-Uri` header at the reverse proxy or load balancer level; explicitly overwrite `X-Forwarded-Uri` with the actual request URI before forwarding requests to OAuth2 Proxy; restrict direct client access to OAuth2 Proxy so it can only be reached through a trusted reverse proxy; and/or remove or narrow `--skip-auth-regex` / `--skip-auth-route` rules where possible. For nginx-based deployments, ensure `X-Forwarded-Uri` is set by nginx and not passed through from the client.","state":0,"publishedAt":"2026-04-21T23:20:30.486+00:00","modifiedAt":"2026-07-15T01:00:45.24+00:00","affected":[{"ecosystem":"Vendor product","name":"oauth2-proxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"oauth2-proxy\",\n                    \"product\": \"oauth2-proxy\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 7.5.0, < 7.15.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-40575","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-40575","identifiers":["CVE-2026-40575"]},"retained":false,"historicalAffected":[]},{"revision":"a72a21a18d064c8a9b24f0f17ebe57c8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-76835","aliases":[],"title":"OAuth2 Proxy 7.15.2 through 7.15.4 Authentication Bypass via X-Forwarded-Uri Under the Default Trusted Proxy Set","description":"OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requests/util/util.go prefers that header over the real request URI whenever CanTrustForwardedHeaders returns true, and isAllowedPath in oauthproxy.go matches the skip_auth_routes and skip_auth_regex allow list against the resulting path. CanTrustForwardedHeaders in pkg/apis/middleware/scope.go grants that trust when the caller's address is in the trusted proxy set, and buildTrustedProxyNetSet falls back to defaultTrustedProxyIPs, which is 0.0.0.0/0 and ::/0, whenever reverse proxy mode is enabled without trusted_proxy_ip configured. Every client is therefore treated as a trusted proxy. An unauthenticated attacker can request a protected upstream path while setting X-Forwarded-Uri to a value matching an allow-listed route, so the skip-auth decision is made against the spoofed value while the upstream receives the protected path unchanged.","state":0,"publishedAt":"2026-08-24T17:55:39.829+00:00","modifiedAt":"2026-10-08T15:25:05.218+00:00","affected":[{"ecosystem":"Vendor product","name":"oauth2-proxy","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"oauth2-proxy\",\n                    \"product\": \"oauth2-proxy\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"7.15.2\",\n                            \"lessThanOrEqual\": \"7.15.4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/oauth2-proxy/oauth2-proxy\",\n                    \"packageURL\": \"pkg:golang/github.com/oauth2-proxy/oauth2-proxy/v7\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-76835","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-76835","identifiers":["CVE-2026-76835"]},"retained":false,"historicalAffected":[]},{"revision":"9215be1ce30b4f23b9e3aa3713b262a0","observedAt":"2026-11-09T09:15:34.328+00:00","statement":{"source":"euvd","id":"EUVD-2026-24557","aliases":["CVE-2026-40575"],"title":"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-aut…","description":"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-auth-route` is configured. An attacker can spoof this header so OAuth2 Proxy evaluates authentication and skip-auth rules against a different path than the one actually sent to the upstream application. This can result in an unauthenticated remote attacker bypassing authentication and accessing protected routes without a valid session. Impacted users are deployments that run oauth2-proxy with `--reverse-proxy` enabled and configure at least one `--skip-auth-regex` or `--skip-auth-route` rule. This issue is patched in `v7.15.2`. Some workarounds are available for those who cannot upgrade immediately. Strip any client-provided `X-Forwarded-Uri` header at the reverse proxy or load balancer level; explicitly overwrite `X-Forwarded-Uri` with the actual request URI before forwarding requests to OAuth2 Proxy; restrict direct client access to OAuth2 Proxy so it can only be reached through a trusted reverse proxy; and/or remove or narrow `--skip-auth-regex` / `--skip-auth-route` rules where possible. For nginx-based deployments, ensure `X-Forwarded-Uri` is set by nginx and not passed through from the client.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":null}],"references":["https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-24557","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 21, 2026, 11:20:30 PM","dateUpdated":"Jul 15, 2026, 1:00:45 AM"},"relatedAdvisories":[{"id":"RHSA-2026:58471","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-40575"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-24557","identifiers":["EUVD-2026-24557","CVE-2026-40575"]},"retained":false,"historicalAffected":[]},{"revision":"d04c005f1ad442d68cb18fd566b5f880","observedAt":"2026-11-09T15:12:53.321+00:00","statement":{"source":"euvd","id":"EUVD-2026-65061","aliases":["CVE-2026-76835","GHSA-vvqv-7vrf-88vh"],"title":"OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requ…","description":"OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requests/util/util.go prefers that header over the real request URI whenever CanTrustForwardedHeaders returns true, and isAllowedPath in oauthproxy.go matches the skip_auth_routes and skip_auth_regex allow list against the resulting path. CanTrustForwardedHeaders in pkg/apis/middleware/scope.go grants that trust when the caller's address is in the trusted proxy set, and buildTrustedProxyNetSet falls back to defaultTrustedProxyIPs, which is 0.0.0.0/0 and ::/0, whenever reverse proxy mode is enabled without trusted_proxy_ip configured. Every client is therefore treated as a trusted proxy. An unauthenticated attacker can request a protected upstream path while setting X-Forwarded-Uri to a value matching an allow-listed route, so the skip-auth decision is made against the spoofed value while the upstream receives the protected path unchanged.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.3,"severity":null}],"references":["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"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-65061","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 24, 2026, 5:55:39 PM","dateUpdated":"Oct 8, 2026, 3:25:05 PM"},"relatedAdvisories":[{"id":"RHSA-2026:74536","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-56851","CVE-2026-76835"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-65061","identifiers":["EUVD-2026-65061","CVE-2026-76835","GHSA-vvqv-7vrf-88vh"]},"retained":false,"historicalAffected":[]},{"revision":"1d99d5513821428b92882e2453974a50","observedAt":"2026-10-25T09:17:30.114+00:00","statement":{"source":"nvd","id":"CVE-2026-40575","aliases":[],"title":"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-aut…","description":"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-auth-route` is configured. An attacker can spoof this header so OAuth2 Proxy evaluates authentication and skip-auth rules against a different path than the one actually sent to the upstream application. This can result in an unauthenticated remote attacker bypassing authentication and accessing protected routes without a valid session. Impacted users are deployments that run oauth2-proxy with `--reverse-proxy` enabled and configure at least one `--skip-auth-regex` or `--skip-auth-route` rule. This issue is patched in `v7.15.2`. Some workarounds are available for those who cannot upgrade immediately. Strip any client-provided `X-Forwarded-Uri` header at the reverse proxy or load balancer level; explicitly overwrite `X-Forwarded-Uri` with the actual request URI before forwarding requests to OAuth2 Proxy; restrict direct client access to OAuth2 Proxy so it can only be reached through a trusted reverse proxy; and/or remove or narrow `--skip-auth-regex` / `--skip-auth-route` rules where possible. For nginx-based deployments, ensure `X-Forwarded-Uri` is set by nginx and not passed through from the client.","state":0,"publishedAt":"2026-04-22T00:16:27.817+00:00","modifiedAt":"2026-07-15T02:21:07.52+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"},{"system":"CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","score":8.7,"severity":"HIGH"}],"references":["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"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-40575","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-290"],"productCriteria":["cpe:2.3:a:oauth2_proxy_project:oauth2_proxy:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-04-22T00:16:27.817","lastModified":"2026-07-15T02:21:07.520"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-40575","identifiers":["CVE-2026-40575"]},"retained":false,"historicalAffected":[]},{"revision":"861d0beab4974918b2d1b9b64bebe835","observedAt":"2026-10-25T16:19:04.694+00:00","statement":{"source":"nvd","id":"CVE-2026-76835","aliases":[],"title":"OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requ…","description":"OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requests/util/util.go prefers that header over the real request URI whenever CanTrustForwardedHeaders returns true, and isAllowedPath in oauthproxy.go matches the skip_auth_routes and skip_auth_regex allow list against the resulting path. CanTrustForwardedHeaders in pkg/apis/middleware/scope.go grants that trust when the caller's address is in the trusted proxy set, and buildTrustedProxyNetSet falls back to defaultTrustedProxyIPs, which is 0.0.0.0/0 and ::/0, whenever reverse proxy mode is enabled without trusted_proxy_ip configured. Every client is therefore treated as a trusted proxy. An unauthenticated attacker can request a protected upstream path while setting X-Forwarded-Uri to a value matching an allow-listed route, so the skip-auth decision is made against the spoofed value while the upstream receives the protected path unchanged.","state":0,"publishedAt":"2026-08-24T18:17:21.57+00:00","modifiedAt":"2026-10-13T09:10:00.323+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["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"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76835","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-290"],"productCriteria":[],"sourceDates":{"published":"2026-08-24T18:17:21.570","lastModified":"2026-10-13T09:10:00.323"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-76835","identifiers":["CVE-2026-76835"]},"retained":false,"historicalAffected":[]},{"revision":"9ae5da8e88e746a09edb83e63ddaac19","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-7x63-xv5r-3p2x","aliases":["BIT-oauth2-proxy-2026-40575","BIT-oauth2-proxy-2026-76835","CVE-2026-40575","CVE-2026-76835","GO-2026-5236"],"title":"OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing","description":"### Impact\n\nA configuration-dependent authentication bypass exists in OAuth2 Proxy.\n\nDeployments are affected when all of the following are true:\n\n* OAuth2 Proxy is configured with `--reverse-proxy`\n* and at least one rule is defined with `--skip_auth_routes` or the legacy `--skip-auth-regex`\n\nOAuth2 Proxy may trust a client-supplied `X-Forwarded-Uri` header when `--reverse-proxy` is enabled and `--skip-auth-route` or `--skip-auth-regex` is configured. An attacker can spoof this header so OAuth2 Proxy evaluates authentication and skip-auth rules against a different path than the one actually sent to the upstream application.\n\nThis can result in an unauthenticated remote attacker bypassing authentication and accessing protected routes without a valid session.\n\n\n### Patches\nThis issue is addressed as part of the newly introduced `--trusted-proxy-ip` flag in `v7.15.2`. If you leave it unset, OAuth2 Proxy will **continue to trust ALL** source IPs (0.0.0.0/0) for backwards compatibility, which means a client may still be able to spoof forwarded headers. Therefore after upgrading we urge you to use the new `--trusted-proxy-ip` flag to set the IPs or CIDR ranges of the reverse proxies that are allowed to send `X-Forwarded-*` headers and furthermore implement the mitigation steps outlined below to properly configure your load balancer infrastructure.\n\n### Mitigation\n\n- Strip any client-provided `X-Forwarded-Uri` header at the reverse proxy or load balancer level\n- Explicitly overwrite `X-Forwarded-Uri` with the actual request URI before forwarding requests to OAuth2 Proxy\n\n  Example nginx mitigation for the auth subrequest:\n  ```\n    location /internal-auth/ {\n      internal; # Ensure external users can't access this path\n  \n      # Make sure the OAuth2 Proxy knows where the original request came from.\n      proxy_set_header Host       $host;\n      proxy_set_header X-Real-IP  $remote_addr;\n      # set the value to the actual $request_uri and therefore strip any user provided X-Forwarded-Uri\n      proxy_set_header X-Forwarded-Uri $request_uri;\n  \n      proxy_pass http://oauth2-proxy:4180/;\n    }\n  ```\n- Restrict direct client access to OAuth2 Proxy so it can only be reached through a trusted reverse proxy\n- Remove or narrow `--skip-auth-route` / `--skip-auth-regex` rules where possible","state":0,"publishedAt":"2026-04-15T19:21:06+00:00","modifiedAt":"2026-09-25T14:25:56.5845424+00:00","affected":[{"ecosystem":"Go","name":"github.com/oauth2-proxy/oauth2-proxy/v7","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.5.0"},{"kind":"fixed","version":"7.15.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"CRITICAL"}],"references":["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"],"sourceUrl":"https://github.com/advisories/GHSA-7x63-xv5r-3p2x","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-7x63-xv5r-3p2x","identifiers":["GHSA-7x63-xv5r-3p2x","BIT-oauth2-proxy-2026-40575","BIT-oauth2-proxy-2026-76835","CVE-2026-40575","CVE-2026-76835","GO-2026-5236"]},"retained":false,"historicalAffected":[]},{"revision":"0d64ee485208443eb83785d151c3c595","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5236","aliases":["BIT-oauth2-proxy-2026-40575","BIT-oauth2-proxy-2026-76835","CVE-2026-40575","CVE-2026-76835","GHSA-7x63-xv5r-3p2x"],"title":"OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing in github.com/oauth2-proxy/oauth2-proxy","description":"OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing in github.com/oauth2-proxy/oauth2-proxy","state":0,"publishedAt":"2026-06-25T18:43:15+00:00","modifiedAt":"2026-09-25T14:25:56.5845424+00:00","affected":[{"ecosystem":"Go","name":"github.com/oauth2-proxy/oauth2-proxy","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/oauth2-proxy/oauth2-proxy/v7","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.5.0"},{"kind":"fixed","version":"7.15.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7x63-xv5r-3p2x","https://nvd.nist.gov/vuln/detail/CVE-2026-40575"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5236","license":"OSV · upstream source license applies","key":"osv:GO-2026-5236","identifiers":["GO-2026-5236","BIT-oauth2-proxy-2026-40575","BIT-oauth2-proxy-2026-76835","CVE-2026-40575","CVE-2026-76835","GHSA-7x63-xv5r-3p2x"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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