Is CVE-2026-13122 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-13122 being exploited in the wild.

How severe is CVE-2026-13122?

Informational severity, with a CVSS score of 5.9, published 6 July 2026.

Which products and versions are affected?

OpenVPN Inc. OpenVPN 2.6.0 through 2.6.20, 2.7_alpha1 through 2.7.4.

Is there a fix for CVE-2026-13122?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-13122 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-13122?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-13122: OpenVPN reachable assertion denial of service in external-auth

CVE-2026-13122 · Severity: info · CVSS 5.9 · Published 2026-07-06

OpenVPN, a widely used software for creating secure private networks, is vulnerable to a flaw that can cause the service to crash. An attacker with basic user credentials could send a specially crafted authentication request that forces the server to shut down. This results in a denial of service, preventing legitimate users from connecting to the corporate network or accessing remote resources.

Quick answers

Is CVE-2026-13122 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-13122 being exploited in the wild.
How severe is CVE-2026-13122?: Informational severity, with a CVSS score of 5.9, published 6 July 2026.
Which products and versions are affected?: OpenVPN Inc. OpenVPN 2.6.0 through 2.6.20, 2.7_alpha1 through 2.7.4.
Is there a fix for CVE-2026-13122?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-13122 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-13122?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A reachable assertion vulnerability (CWE-617) exists in OpenVPN when the 'external-auth' feature is enabled. Remote attackers with low privileges can exploit this by providing a malformed authentication token during the connection process. The malformed token triggers an internal assertion failure, causing the OpenVPN process to terminate unexpectedly. This vulnerability affects versions 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4. Successful exploitation results in a complete loss of availability for the VPN service.

Affected products

OpenVPN Inc. OpenVPN 2.6.0 through 2.6.20, 2.7_alpha1 through 2.7.4

Timeline

2026-07-06: advisory: NVD publication date

References

https://community.openvpn.net/Security%20Announcements/CVE-2026-13122

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