Vulnerability in Openvpn

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

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-13122: held from 0.003 to 0.005.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

  • Openvpn — versions 2.6.0, 2.7_alpha1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-13122?
CVE-2026-13122 is a medium-severity vulnerability in Openvpn, classified under Reachable Assertion. CVSS score: 5.3/10. Published 2026-07-06.
How severe is CVE-2026-13122?
Medium severity. CVSS v3 base score is 5.3 out of 10.