{"id":"CVE-2026-41070","revision":"3f68229716074fe59d2e4933accbdf84","records":[{"revision":"3f68229716074fe59d2e4933accbdf84","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-41070","aliases":[],"title":"openvpn-auth-oauth2 returns FUNC_SUCCESS on client-deny, allowing unauthenticated VPN access","description":"openvpn-auth-oauth2 is a plugin/management interface client for OpenVPN server to handle an OIDC based single sign-on (SSO) auth flows. From version 1.26.3 to before version 1.27.3, when openvpn-auth-oauth2 is deployed in the experimental plugin mode (shared library loaded by OpenVPN via the plugin directive), clients that do not support WebAuth/SSO (e.g., the openvpn CLI on Linux) are incorrectly admitted to the VPN despite being denied by the authentication logic. The default management-interface mode is not affected because it does not use the OpenVPN plugin return-code mechanism. This issue has been patched in version 1.27.3.","state":0,"publishedAt":"2026-05-08T15:14:46.186+00:00","modifiedAt":"2026-05-08T16:05:34.531+00:00","affected":[{"ecosystem":"Vendor product","name":"openvpn-auth-oauth2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"jkroepke\",\n                    \"product\": \"openvpn-auth-oauth2\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.26.3, < 1.27.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","score":10,"severity":"CRITICAL"}],"references":["https://github.com/jkroepke/openvpn-auth-oauth2/security/advisories/GHSA-246w-jgmq-88fg","https://github.com/jkroepke/openvpn-auth-oauth2/commit/36f69a6c67c1054da7cbfa04ced3f0555127c8f2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-41070","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-41070","identifiers":["CVE-2026-41070"]},"retained":false,"historicalAffected":[]}],"coverage":[]}