Vulnerability · Published Oct 13, 2026 · Assigned by OpenVPN
CVE-2026-84790
High 7.6
In plain English
A high-severity authentication bypass by spoofing in OpenVPN from OpenVPN. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)7.6High
Exploit odds (30 days)0.1%top 96.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | openvpn | no fix listed | DEBIAN-CVE-2026-84790 |
| Debian:13 | openvpn | no fix listed | DEBIAN-CVE-2026-84790 |
| Debian:14 | openvpn | 2.7.8-1 | DEBIAN-CVE-2026-84790 |
| Ubuntu:22.04:LTS | openvpn | 2.5.11-0ubuntu0.22.04.6 | USN-8953-1 |
| Ubuntu:22.04:LTS | openvpn | 2.5.11-0ubuntu0.22.04.6 | UBUNTU-CVE-2026-84790 |
| Ubuntu:24.04:LTS | openvpn | 2.6.19-0ubuntu0.24.04.5 | UBUNTU-CVE-2026-84790 |
| Ubuntu:24.04:LTS | openvpn | 2.6.19-0ubuntu0.24.04.5 | USN-8953-1 |
| Ubuntu:26.04:LTS | openvpn | 2.7.0-1ubuntu1.4 | UBUNTU-CVE-2026-84790 |
| Ubuntu:26.04:LTS | openvpn | 2.7.0-1ubuntu1.4 | USN-8953-1 |
| Ubuntu:26.10 | openvpn | 2.7.7-1ubuntu1.1 | UBUNTU-CVE-2026-84790 |
| Ubuntu:26.10 | openvpn | 2.7.7-1ubuntu1.1 | USN-8953-1 |
Affected products (as reported)
Weakness: CWE-290, CWE-158 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N