CVE-2026-13698: openvpn DoS — Fix

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

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0055

Probability of exploitation

0.43%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-401 CWE-401

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
openvpn	openvpn	2.5.0 — 2.5.11
openvpn	openvpn	2.6.0 — 2.6.21
openvpn	openvpn	2.7 — 2.7.5

References

Advisories & Patches

https://community.openvpn.net/Security%20Announcements/CVE-2026-13698

Frequently Asked Questions

What is 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 It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-13698? +

CVE-2026-13698 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0055, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-13698? +

CVE-2026-13698 affects products from openvpn, specifically: openvpn. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-13698? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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