OpenVPN 2.6.0-2.6.20/2.7.0-2.7.4 Remote DoS via Malformed Auth Token
CVE-2026-13122 Published on July 6, 2026
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
Vulnerability Analysis
CVE-2026-13122 is exploitable with network access. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2026-13122 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2026-13122
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Affected Versions
OpenVPN:- Version 2.6.0, <= 2.6.20 is affected.
- Version 2.7_alpha1, <= 2.7.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.