{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58393", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-30T18:19:58.377Z", "datePublished": "2026-10-15T15:15:45.924Z", "dateUpdated": "2026-10-15T16:07:55.688Z"}, "containers": {"cna": {"title": "OPNsense: OpenVPN Client Specific Override common_name allows path traversal in generated CSO files", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/opnsense/core/security/advisories/GHSA-2m9v-p7r9-gfcw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/opnsense/core/security/advisories/GHSA-2m9v-p7r9-gfcw"}, {"name": "https://github.com/opnsense/core/commit/3af496143a19153c18b2f9458b2510d58aff2b98", "tags": ["x_refsource_MISC"], "url": "https://github.com/opnsense/core/commit/3af496143a19153c18b2f9458b2510d58aff2b98"}, {"name": "https://github.com/opnsense/core/commit/6101b3e2c90482111f420a47775c14a447441a72", "tags": ["x_refsource_MISC"], "url": "https://github.com/opnsense/core/commit/6101b3e2c90482111f420a47775c14a447441a72"}], "affected": [{"vendor": "opnsense", "product": "core", "versions": [{"version": "< 26.1.11", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-15T15:15:45.924Z"}, "descriptions": [{"lang": "en", "value": "OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, the OpenVPN Client Specific Override common_name field accepts path traversal sequences and openvpn_csc_conf_write() concatenates the value into /var/etc/openvpn-csc/<vpnid>/<common_name> without normalization or a basename check. The affected event handlers are client_connect.php and user_pass_verify.php. An authenticated user with Client Specific Override privileges can store the traversal value, and a matching OpenVPN client-connect or authentication event causes a generated CSO file to be written outside the intended directory. The file content is generated OpenVPN configuration rather than arbitrary bytes, and practical exploitation requires the attacker to cause a matching common name or username to be processed. This issue is fixed in version 26.1.11."}], "source": {"advisory": "GHSA-2m9v-p7r9-gfcw", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/opnsense/core/security/advisories/GHSA-2m9v-p7r9-gfcw", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-15T16:07:43.427308Z", "id": "CVE-2026-58393", "options": [{"Exploitation": "poc"}, {"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": "2026-10-15T16:07:55.688Z"}}]}}

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