CVE WatchOct 15, 2026

CVE-2026-58394

OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.11, src/www/system_advanced_admin.php reads certificate rec

CVSS

5.2

Medium

EPSS

0.2%

p14

KEV

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Exploit Today

0-100

Published: Oct 15, 2026 · Last modified: Oct 15, 2026 · CWE-79

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-10-162026-10-20

Technical 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.

Official references

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