Widely-used VPN infra; critical auth bypass in a core component; patch available.
CVE-2026-41070
Authentication bypass in openvpn-auth-oauth2 plugin may admit non-SSO users to VPN.
Is CVE-2026-41070 being exploited?
Not confirmed. CVE-2026-41070 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-41070?
CVE-2026-41070 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-41070?
Yes. A fix has been recorded for CVE-2026-41070. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-41070 affect?
CVE-2026-41070 affects OpenVPN server, openvpn-auth-oauth2 plugin (experimental mode). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-41070?
Apply patch 1.27.3; verify access controls; monitor VPN logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
VPN auth bypass lets non-WebAuth/SSO clients connect, bypassing login checks.
Patch when possible
- affected>= 1.26.3 and < 1.27.3
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.