---
id: CVE-2026-13117
title: >-
  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
summary: >-
  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
severity: medium
cvss: 6
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-416
vendor: OpenVPN
product: OpenVPN
affected:
  - OpenVPN >= 2.6.0 <= 2.6.20
  - OpenVPN >= 2.7_alpha1 <= 2.7.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-30T18:08:14.034841Z'
published: '2026-07-30'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:36:22.675Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-13117'
references:
  - url: 'https://community.openvpn.net/Security%20Announcements/CVE-2026-13117'
  - url: >-
      https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026
  - url: >-
      https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026
tags:
  - cve.org
epss: 0.00642
epssPercentile: 0.48607
ingestedAt: '2026-09-17T19:26:25.353Z'
---

## Overview

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

## Affected

- `OpenVPN >= 2.6.0 <= 2.6.20`
- `OpenVPN >= 2.7_alpha1 <= 2.7.4`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.