What is CVE-2026-13117?

CVE-2026-13117 is a high-severity vulnerability in Openvpn, classified under Use After Free. CVSS score: 8.1/10. Published 2026-07-30.

How severe is CVE-2026-13117?

High severity. CVSS v3 base score is 8.1 out of 10.

Use After Free in Openvpn

CVE-2026-13117

An incomplete guard in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to trigger a use-after-free during TLS session promotion, potentially leading to a denial of service or memory leakage

Vulnerability class: Use-After-Free

EPSS: 0.004 (33.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Openvpn — versions 2.6.0, 2.7_alpha1

Weakness classification (CWE)

CWE-416 — Use After Free

References

security@openvpn.net (vendor-advisory, Vendor Advisory)
security@openvpn.net (release-notes, Release Notes)
security@openvpn.net (release-notes, Release Notes)

Frequently asked questions

What is CVE-2026-13117?: CVE-2026-13117 is a high-severity vulnerability in Openvpn, classified under Use After Free. CVSS score: 8.1/10. Published 2026-07-30.
How severe is CVE-2026-13117?: High severity. CVSS v3 base score is 8.1 out of 10.