CVE-2026-13122

Medium

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

SeverityMedium

CVSS5.3

Exploit probability—

ProductOpenvpn

PublishedJul 6, 2026

First seenJul 6, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

openvpn openvpn2.6.21, 2.7.5 or later

Vendor advisories

community.openvpn.net/Security%20Announcements/CVE-2026-13122

Affected products

Product	Affected versions	Fixed in
openvpn openvpn	2.6.0 ≤ v < 2.6.21, 2.7 ≤ v < 2.7.5	2.6.21, 2.7.5

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