openvpn vulnerabilities (CVE-2026-35058)
Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. (CVE-2026-35058) Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a previous handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-40215)
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-35058 affects OpenVPN versions 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1. It arises from improper validation of packet length during the tls-crypt-v2 key extraction phase. An authenticated attacker can exploit this by sending a specially crafted packet that triggers a fatal assertion failure in the software, leading to a denial of service condition. The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, requiring privileges, no user interaction, and impact limited to availability.
Potential Impact
Exploitation of this vulnerability results in a denial of service by crashing the OpenVPN process handling the tls-crypt-v2 key extraction. There is no impact on confidentiality or integrity. The attack requires the attacker to be authenticated and able to send crafted packets to the vulnerable OpenVPN instance.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to the OpenVPN service to trusted users and monitor for unusual connection disruptions. Avoid exposing the service to untrusted networks where possible.
openvpn vulnerabilities (CVE-2026-35058)
Description
Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. (CVE-2026-35058) Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a previous handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-40215)
Affected software
pkg:github/openvpn/openvpnRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-35058 affects OpenVPN versions 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1. It arises from improper validation of packet length during the tls-crypt-v2 key extraction phase. An authenticated attacker can exploit this by sending a specially crafted packet that triggers a fatal assertion failure in the software, leading to a denial of service condition. The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, requiring privileges, no user interaction, and impact limited to availability.
Potential Impact
Exploitation of this vulnerability results in a denial of service by crashing the OpenVPN process handling the tls-crypt-v2 key extraction. There is no impact on confidentiality or integrity. The attack requires the attacker to be authenticated and able to send crafted packets to the vulnerable OpenVPN instance.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to the OpenVPN service to trusted users and monitor for unusual connection disruptions. Avoid exposing the service to untrusted networks where possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-22j3-3q48-2rmj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-35058"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a7b6fd9bf8831d5393eaff3
Added to database: 08/11/2026, 18:54:17 UTC
Last enriched: 08/11/2026, 19:03:52 UTC
Last updated: 09/25/2026, 22:00:14 UTC
Views: 46
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