CVE-2026-13698 Denial of service in OpenVPN
Remote attackers with valid keys can cause a denial of service via memory leak in OpenVPN, requiring upgrades to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-13698?
CVE-2026-13698 is a medium-severity denial of service vulnerability in OpenVPN, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service
Which versions are affected by CVE-2026-13698?
It affects 1 product.
Products include Openvpn Openvpn.
How do I fix CVE-2026-13698?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-13698 being exploited?
There is no known exploitation of CVE-2026-13698 in the wild and no public exploit code.
Other vulnerabilities in OpenVPN
Sources
Also known as ALPINE-CVE-2026-13698, DEBIAN-CVE-2026-13698, GHSA-rwhm-c36w-484h, UBUNTU-CVE-2026-13698.