{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-13122", "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e", "state": "PUBLISHED", "assignerShortName": "OpenVPN", "dateReserved": "2026-06-23T22:11:24.264Z", "datePublished": "2026-07-06T14:32:29.371Z", "dateUpdated": "2026-07-06T15:51:50.731Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e", "shortName": "OpenVPN", "dateUpdated": "2026-07-06T14:46:19.369Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-617", "description": "CWE-617 Reachable Assertion", "type": "CWE"}]}], "affected": [{"vendor": "Openvpn", "product": "OpenVPN", "versions": [{"status": "affected", "version": "2.6.0", "lessThanOrEqual": "2.6.20", "versionType": "semver"}, {"status": "affected", "version": "2.7_alpha1", "lessThanOrEqual": "2.7.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled"}], "references": [{"url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-13122", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.9, "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:N"}}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-06T15:51:45.374719Z", "id": "CVE-2026-13122", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-06T15:51:50.731Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-13122", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-06T15:51:45.374719Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-06T15:51:47.740Z"}}], "cna": {"metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.9, "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:N", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Openvpn", "product": "OpenVPN", "versions": [{"status": "affected", "version": "2.6.0", "versionType": "semver", "lessThanOrEqual": "2.6.20"}, {"status": "affected", "version": "2.7_alpha1", "versionType": "semver", "lessThanOrEqual": "2.7.4"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-13122", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled"}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-617", "description": "CWE-617 Reachable Assertion"}]}], "providerMetadata": {"orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e", "shortName": "OpenVPN", "dateUpdated": "2026-07-06T14:46:19.369Z"}}}, "cveMetadata": {"cveId": "CVE-2026-13122", "state": "PUBLISHED", "dateUpdated": "2026-07-06T15:51:50.731Z", "dateReserved": "2026-06-23T22:11:24.264Z", "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e", "datePublished": "2026-07-06T14:32:29.371Z", "assignerShortName": "OpenVPN"}, "dataVersion": "5.2"}

{}

{"bugzilla": {"description": "openvpn: From CVEorg collector", "id": "2497374", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497374"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-617", "details": ["OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled", "A flaw was found in OpenVPN. A remote attacker can exploit this vulnerability by sending a malformed authentication token. This can trigger a reachable assertion when external authentication (external-auth) is enabled, leading to a Denial of Service (DoS) condition for the OpenVPN server."], "mitigation": {"lang": "en:us", "value": "To reduce exposure, disable the `external-auth` feature in OpenVPN if it is not required. This can be done by removing or commenting out the `external-auth` directive in the OpenVPN configuration file. If `external-auth` is necessary, restrict network access to the OpenVPN service to trusted clients through firewall rules. A restart of the OpenVPN service is required for configuration changes to take effect, which may temporarily disrupt active connections."}, "name": "CVE-2026-13122", "public_date": "2026-07-06T14:32:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-13122\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-13122\nhttps://community.openvpn.net/Security%20Announcements/CVE-2026-13122"], "statement": "A Moderate denial of service flaw exists in OpenVPN when configured with `external-auth`. Remote attackers can exploit this by sending a specially crafted authentication token, leading to a reachable assertion and service unavailability. This issue specifically impacts deployments where external authentication is enabled, increasing the attack surface.", "threat_severity": "Moderate"}