GHSA-m5x7-29rp-3xmr
OpenVPN versions 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 contain a vulnerability that allows remote attackers to cause a denial of service. This occurs when a malformed authentication token triggers a reachable assertion failure if the external-auth feature is enabled.
AI Analysis
Technical Summary
This vulnerability in OpenVPN affects versions 2.6.0 to 2.6.20 and 2.7_alpha1 to 2.7.4. It allows remote attackers to cause a denial of service by sending a malformed authentication token that triggers an assertion failure when the external-auth option is enabled. The issue is classified under CWE-617 (Reachable Assertion). No known exploits are reported in the wild, and no patch or official remediation information is currently provided.
Potential Impact
Successful exploitation results in a denial of service condition, disrupting VPN service availability for affected users. There is no indication of confidentiality or integrity impact. The attack requires low privileges and user interaction, with high attack complexity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider disabling the external-auth feature if feasible to mitigate the risk of denial of service from malformed authentication tokens.
GHSA-m5x7-29rp-3xmr
Description
OpenVPN versions 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 contain a vulnerability that allows remote attackers to cause a denial of service. This occurs when a malformed authentication token triggers a reachable assertion failure if the external-auth feature is enabled.
CVSS v4.0
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
This vulnerability in OpenVPN affects versions 2.6.0 to 2.6.20 and 2.7_alpha1 to 2.7.4. It allows remote attackers to cause a denial of service by sending a malformed authentication token that triggers an assertion failure when the external-auth option is enabled. The issue is classified under CWE-617 (Reachable Assertion). No known exploits are reported in the wild, and no patch or official remediation information is currently provided.
Potential Impact
Successful exploitation results in a denial of service condition, disrupting VPN service availability for affected users. There is no indication of confidentiality or integrity impact. The attack requires low privileges and user interaction, with high attack complexity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider disabling the external-auth feature if feasible to mitigate the risk of denial of service from malformed authentication tokens.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-m5x7-29rp-3xmr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-13122"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6a4c344927e9c797195fbafb
Added to database: 07/06/2026, 23:03:37 UTC
Last enriched: 07/06/2026, 23:28:10 UTC
Last updated: 07/06/2026, 23:28:10 UTC
Views: 2
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