{"id":"CVE-2026-58394","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-58394","generatedAt":"2026-10-28T04:35:22.843Z","title":"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.","description":"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.","published":"2026-10-15T16:18:18.000Z","lastModified":"2026-10-15T21:08:50.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00239,"percentile":0.14922,"date":"2026-10-27","history":[{"date":"2026-10-16","score":0.00239,"percentile":0.13958}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T16:18:18.000Z","detail":{"score":"5.2","severity":"MEDIUM","publishedAt":"2026-10-15T16:18:18.447Z"},"summary":"New CVE, medium severity (CVSS 5.2)."}],"references":[{"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":"security-advisories@github.com"},{"url":"https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-58394","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}