CVE-2026-35058

Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026	Release Notes
https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026	Release Notes
https://community.openvpn.net/Security%20Announcements/CVE-2026-35058	Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2381	Exploit Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:openvpn:openvpn::::::::
	cpe:2.3:a:openvpn:openvpn::::::::

History

No history.

Information

Published : 2026-06-08 20:17

Updated : 2026-08-11 13:11

NVD link : CVE-2026-35058

Mitre link : CVE-2026-35058

CVE.ORG link : CVE-2026-35058

JSON object : View

Products Affected

openvpn

openvpn

CWE

CWE-617

Reachable Assertion

{"id": "CVE-2026-35058", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-35058", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-08T19:49:03.100020Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "security@openvpn.net", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security@openvpn.net", "affectedData": [{"vendor": "OpenVPN", "product": "OpenVPN", "versions": [{"status": "affected", "version": "2.6.0", "versionType": "semver", "lessThanOrEqual": "2.6.19"}, {"status": "affected", "version": "2.7_alpha1", "versionType": "semver", "lessThanOrEqual": "2.7.1"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-08T20:17:00.497", "references": [{"url": "https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026", "tags": ["Release Notes"], "source": "security@openvpn.net"}, {"url": "https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026", "tags": ["Release Notes"], "source": "security@openvpn.net"}, {"url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-35058", "tags": ["Vendor Advisory"], "source": "security@openvpn.net"}, {"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2381", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@openvpn.net", "description": [{"lang": "en", "value": "CWE-617"}]}], "descriptions": [{"lang": "en", "value": "Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet."}, {"lang": "es", "value": "Validaci\u00f3n incorrecta de la longitud del paquete durante la extracci\u00f3n de clave tls-crypt-v2 en OpenVPN 2.6.0 hasta 2.6.19 y 2.7_alpha1 hasta 2.7.1 permite a atacantes autenticados activar una aserci\u00f3n fatal y causar una denegaci\u00f3n de servicio a trav\u00e9s de un paquete especialmente dise\u00f1ado."}], "lastModified": "2026-08-11T13:11:16.357", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D663963E-B261-4F04-89A8-6289E24AA4A0", "versionEndExcluding": "2.6.20", "versionStartIncluding": "2.6.0"}, {"criteria": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "049147D3-D6CE-471B-B0FF-C5166352F3DD", "versionEndExcluding": "2.7.2", "versionStartIncluding": "2.7"}], "operator": "OR"}]}], "sourceIdentifier": "security@openvpn.net"}