{"cve":"CVE-2026-41070","nvd":{"published":"2026-05-08T16:16:11.030","modified":"2026-10-26T18:10:00.173","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","score":10.0},"cwes":["CWE-287"],"references":["https://github.com/jkroepke/openvpn-auth-oauth2/commit/36f69a6c67c1054da7cbfa04ced3f0555127c8f2","https://github.com/jkroepke/openvpn-auth-oauth2/security/advisories/GHSA-246w-jgmq-88fg"],"products":[],"source":"nvd","synced_at":"2026-10-26T18:27:13.530666824+00:00"},"epss":{"cve":"CVE-2026-41070","score":0.00438,"percentile":0.37811,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-246w-jgmq-88fg","url":"https://osv.dev/vulnerability/GHSA-246w-jgmq-88fg","summary":"openvpn-auth-oauth2 returns FUNC_SUCCESS on client-deny, allowing unauthenticated VPN access","modified":"2026-05-20T19:41:27.183534498Z","packages":[{"ecosystem":"Go","name":"github.com/jkroepke/openvpn-auth-oauth2","purl":"pkg:golang/github.com/jkroepke/openvpn-auth-oauth2","ranges":[">=1.26.3 <1.27.3"],"fixed":["1.27.3"]}]},{"id":"GO-2026-4963","url":"https://osv.dev/vulnerability/GO-2026-4963","summary":"openvpn-auth-oauth2 returns FUNC_SUCCESS on client-deny, allowing unauthenticated VPN access in github.com/jkroepke/openvpn-auth-oauth2","modified":"2026-05-20T19:30:11.543633656Z","packages":[{"ecosystem":"Go","name":"github.com/jkroepke/openvpn-auth-oauth2","purl":"pkg:golang/github.com/jkroepke/openvpn-auth-oauth2","ranges":[">=1.26.3 <1.27.3"],"fixed":["1.27.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}