A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00314.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
OpenVPN OpenVPN unaffected
Version Status Constraints
2.5.0 affected ≤ 2.5.11
2.6.0 affected ≤ 2.6.20
2.7_alpha1 affected ≤ 2.7.4

No data.

No data.

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Vendors Products
Openvpn Subscribe
Openvpn Subscribe

Project Subscriptions

Vendors Products
Openvpn Subscribe
Openvpn Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4666-1 openvpn security update
Debian DSA Debian DSA DSA-6376-1 openvpn security update
Ubuntu USN Ubuntu USN USN-8540-1 OpenVPN vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://community.openvpn.net/Security%20Announcements/CVE-2026-13698 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-13698 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-13698 cve-icon
History

Thu, 09 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Title Memory Leak in OpenVPN TLS‑Crypt‑V2 Client Key Processing Leading to Potential Denial of Service openvpn: From CVEorg collector
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 08 Jul 2026 22:00:00 +0000

Type Values Removed Values Added
Title Memory Leak in OpenVPN TLS‑Crypt‑V2 Client Key Processing Leading to Potential Denial of Service

Wed, 08 Jul 2026 06:00:00 +0000

Type Values Removed Values Added
Title Memory Leak Causing Remote Denial of Service in OpenVPN

Tue, 07 Jul 2026 06:15:00 +0000

Type Values Removed Values Added
Title Memory Leak Causing Remote Denial of Service in OpenVPN

Mon, 06 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 06 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
First Time appeared Openvpn
Openvpn openvpn
Vendors & Products Openvpn
Openvpn openvpn

Mon, 06 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Description A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service
Weaknesses CWE-401
CWE-770
References
Metrics cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published:

Updated: 2026-07-06T15:28:16.081Z

Reserved: 2026-06-29T11:47:58.522Z

Link: CVE-2026-13698

cve-icon Vulnrichment

Updated: 2026-07-06T15:28:10.841Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-06T14:13:49Z

Links: CVE-2026-13698 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-07-26T20:45:03Z

Weaknesses