What is CVE-2026-13698?

CVE-2026-13698 is a high-severity vulnerability in Openvpn, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2026-07-06.

How severe is CVE-2026-13698?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Openvpn

CVE-2026-13698

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

Published 2026-07-06 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (44.2th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Openvpn — versions 2.5.0, 2.6.0, 2.7_alpha1

Weakness classification (CWE)

References

community.openvpn.net/Security Announcements/CVE-2026-13698 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-13698?: CVE-2026-13698 is a high-severity vulnerability in Openvpn, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2026-07-06.
How severe is CVE-2026-13698?: High severity. CVSS v3 base score is 7.5 out of 10.