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// vulnerability record
cached · NVD via COSMOS syncCVE-2026-41070
CRITICALpublished 2026-05-08 16:16 UTC · 3 months ago · modified 2026-06-17 10:46 UTC
10.0
CVSS / 10
// 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.
// weaknesses (CWE)
- CWE-287