What is CVE-2026-41070?

CVE-2026-41070 is a critical-severity vulnerability in Jkroepke Openvpn-auth-oauth2, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-05-08.

How severe is CVE-2026-41070?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Jkroepke Openvpn-auth-oauth2

CVE-2026-41070

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…

Vulnerability class: Broken Authentication

EPSS: 0.000 (6.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.

Affected products

Jkroepke Openvpn-auth-oauth2 — versions >= 1.26.3, < 1.27.3

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-41070?: CVE-2026-41070 is a critical-severity vulnerability in Jkroepke Openvpn-auth-oauth2, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-05-08.
How severe is CVE-2026-41070?: Critical severity. CVSS v3 base score is 10.0 out of 10.