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

EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.

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.

Affected products

Openvpn — versions 2.5.0, 2.6.0, 2.7_alpha1

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime
CWE-770 — Allocation of Resources Without Limits or Throttling

References

security@openvpn.net (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.