CVE-2026-13122: openvpn — Fix

Description

OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled

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CVSS v3.1 Score

5.3

MEDIUM

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

EPSS — Exploit Prediction

0.0049

Probability of exploitation

0.39%

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-617 CWE-617

Affected Products

Vendor	Product	Versions
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-2026-13122

Frequently Asked Questions

What is CVE-2026-13122? +

OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-13122? +

CVE-2026-13122 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0049, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-13122? +

CVE-2026-13122 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-2026-13122? +

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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