CVE-2026-106017
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows...
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Record
CVE-2026-106017- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U - Weakness
- CWE-295
- Updated
- 2026-11-02
EUVDEUVD-2026-108107
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Record
EUVD-2026-108107- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rr4q-p38q-3hw2
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows...
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Record
GHSA-rr4q-p38q-3hw2- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-295
- Updated
- 2026-11-02
NVD
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Record
CVE-2026-106017- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-295
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-106017
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Record
DEBIAN-CVE-2026-106017- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-106017
Improper certificate validation in the OpenVPN 3 Core library version 3.4 through 3.11.7 allows attackers to circumvent extended key usage restrictions.
- Record
UBUNTU-CVE-2026-106017- CVSS 4.0
- 6.3 Medium
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:U - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openvpn3-clientDebian:13 |
All versions, plus listed versions 24.1+dfsg-125+dfsg-125+dfsg-225+dfsg-325+dfsg-4 Show 5 moreShow less26+dfsg-126+dfsg-227+dfsg-127.1+dfsg-127.1+dfsg-2 |
None known |
openvpn3-clientDebian:14 |
All versions, plus listed versions 24.1+dfsg-125+dfsg-125+dfsg-225+dfsg-325+dfsg-4 Show 5 moreShow less26+dfsg-126+dfsg-227+dfsg-127.1+dfsg-127.1+dfsg-2 |
None known |
openvpnUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 2.3.2-4ubuntu12.3.2-5ubuntu12.3.2-7ubuntu12.3.2-7ubuntu22.3.2-7ubuntu3 Show 4 moreShow less2.3.2-7ubuntu3.12.3.2-7ubuntu3.22.3.2-7ubuntu3.2+esm12.3.2-7ubuntu3.2+esm2 |
None known |
openvpnUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.3.7-1ubuntu12.3.7-2ubuntu12.3.8-1ubuntu12.3.10-1ubuntu12.3.10-1ubuntu2 Show 4 moreShow less2.3.10-1ubuntu2.12.3.10-1ubuntu2.22.3.10-1ubuntu2.2+esm12.3.10-1ubuntu2.2+esm2 |
None known |
openvpnUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.4.3-4ubuntu12.4.4-1ubuntu12.4.4-2ubuntu12.4.4-2ubuntu1.12.4.4-2ubuntu1.2 Show 5 moreShow less2.4.4-2ubuntu1.32.4.4-2ubuntu1.52.4.4-2ubuntu1.62.4.4-2ubuntu1.72.4.4-2ubuntu1.7+esm1 |
None known |
openvpnUbuntu:20.04:LTS |
All versions, plus listed versions 2.4.7-1ubuntu22.4.7-1ubuntu2.20.04.22.4.7-1ubuntu2.20.04.32.4.7-1ubuntu2.20.04.42.4.12-0ubuntu0.20.04.12.4.12-0ubuntu0.20.04.2 |
None known |
openvpnUbuntu:22.04:LTS |
All versions, plus listed versions 2.5.1-3ubuntu12.5.1-3ubuntu22.5.1-3ubuntu42.5.1-3ubuntu52.5.5-1ubuntu1 Show 9 moreShow less2.5.5-1ubuntu32.5.5-1ubuntu3.12.5.9-0ubuntu0.22.04.22.5.9-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.12.5.11-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.42.5.11-0ubuntu0.22.04.52.5.11-0ubuntu0.22.04.6 |
None known |
openvpnUbuntu:24.04:LTS |
All versions, plus listed versions 2.6.5-0ubuntu12.6.7-1ubuntu12.6.9-1ubuntu22.6.9-1ubuntu32.6.9-1ubuntu4 Show 11 moreShow less2.6.9-1ubuntu4.12.6.12-0ubuntu0.24.04.12.6.12-0ubuntu0.24.04.32.6.14-0ubuntu0.24.04.12.6.14-0ubuntu0.24.04.22.6.14-0ubuntu0.24.04.32.6.19-0ubuntu0.24.04.12.6.19-0ubuntu0.24.04.22.6.19-0ubuntu0.24.04.32.6.19-0ubuntu0.24.04.42.6.19-0ubuntu0.24.04.5 |
None known |
openvpnUbuntu:26.10 |
All versions, plus listed versions 2.7.0-1ubuntu12.7.3-1ubuntu22.7.5-1ubuntu22.7.5-1ubuntu32.7.7-1ubuntu12.7.7-1ubuntu1.1 |
None known |
openvpnUbuntu:26.04:LTS |
All versions, plus listed versions 2.6.14-2ubuntu12.6.15-1ubuntu12.7.0~rc5-1ubuntu52.7.0~rc6-1ubuntu12.7.0-1ubuntu1 Show 4 moreShow less2.7.0-1ubuntu1.12.7.0-1ubuntu1.22.7.0-1ubuntu1.32.7.0-1ubuntu1.4 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-106017 is a medium vulnerability (CVSS 6.3) in Openvpn 3 Core Library, published October 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. No source names a fixed version.