CVE-2026-58394

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58394", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-30T18:19:58.378Z", "datePublished": "2026-10-15T15:20:15.232Z", "dateUpdated": "2026-10-15T18:36:57.734Z"}, "containers": {"cna": {"title": "OPNsense: Stored XSS in Administration Settings via Certificate Description", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j"}, {"name": "https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb", "tags": ["x_refsource_MISC"], "url": "https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb"}, {"name": "https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674", "tags": ["x_refsource_MISC"], "url": "https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674"}, {"name": "https://hackerask.com/posts/opnsense", "tags": ["x_refsource_MISC"], "url": "https://hackerask.com/posts/opnsense"}], "affected": [{"vendor": "opnsense", "product": "core", "versions": [{"version": "< 26.1.11", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-15T15:20:15.232Z"}, "descriptions": [{"lang": "en", "value": "OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_admin.php reads certificate records into $a_cert but omits that array from legacy_html_escape_form_data() before rendering each certificate descr value in the SSL Certificate selector. The certificate description accepts HTML metacharacters, allowing a user with the page-system-certmanager privilege to store markup that executes when another user opens System Settings Administration. This issue is fixed in version 26.1.11."}], "source": {"advisory": "GHSA-8pgr-x852-qx4j", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-15T18:35:21.476267Z", "id": "CVE-2026-58394", "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": "2026-10-15T18:36:57.734Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-58394", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-15T18:35:21.476267Z"}}}], "references": [{"url": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T18:35:31.990Z"}}], "cna": {"title": "OPNsense: Stored XSS in Administration Settings via Certificate Description", "source": {"advisory": "GHSA-8pgr-x852-qx4j", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.2, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "opnsense", "product": "core", "versions": [{"status": "affected", "version": "< 26.1.11"}]}], "references": [{"url": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j", "name": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb", "name": "https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674", "name": "https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674", "tags": ["x_refsource_MISC"]}, {"url": "https://hackerask.com/posts/opnsense", "name": "https://hackerask.com/posts/opnsense", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_admin.php reads certificate records into $a_cert but omits that array from legacy_html_escape_form_data() before rendering each certificate descr value in the SSL Certificate selector. The certificate description accepts HTML metacharacters, allowing a user with the page-system-certmanager privilege to store markup that executes when another user opens System Settings Administration. This issue is fixed in version 26.1.11."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-15T15:20:15.232Z"}}}, "cveMetadata": {"cveId": "CVE-2026-58394", "state": "PUBLISHED", "dateUpdated": "2026-10-15T18:36:57.734Z", "dateReserved": "2026-06-30T18:19:58.378Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-10-15T15:20:15.232Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "core", "vendor": "opnsense", "versions": [{"status": "affected", "version": "< 26.1.11"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_admin.php reads certificate records into $a_cert but omits that array from legacy_html_escape_form_data() before rendering each certificate descr value in the SSL Certificate selector. The certificate description accepts HTML metacharacters, allowing a user with the page-system-certmanager privilege to store markup that executes when another user opens System Settings Administration. This issue is fixed in version 26.1.11."}], "id": "CVE-2026-58394", "lastModified": "2026-10-15T21:08:49.703", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-58394", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T18:35:21.476267Z", "version": "2.0.3"}}]}, "published": "2026-10-15T16:18:18.447", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb"}, {"source": "security-advisories@github.com", "url": "https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674"}, {"source": "security-advisories@github.com", "url": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j"}, {"source": "security-advisories@github.com", "url": "https://hackerask.com/posts/opnsense"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,26.1.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "core", "source": "cna", "vendor": "opnsense"}, "product": "core", "vendor": "opnsense"}], "created": "2026-10-16T21:15:14.692558+00:00", "updated": "2026-10-17T18:30:06.516246+00:00", "vendors": ["opnsense", "opnsense$PRODUCT$core"]}