CVE-2026-58394

Published: Oct 15, 2026Modified: Oct 15, 2026Deferred

5.2

Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N

Exploitability: 0.9 / Impact: 4.2

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (5)

https://github.com/opnsense/core/commit/9d0a590e9c49f4374a5539929b366123f63bc9eb

Source: security-advisories@github.com

https://github.com/opnsense/core/commit/adcb02f8f68071e636bf9660b2cb8d0229f34674

Source: security-advisories@github.com

https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j

Source: security-advisories@github.com

https://hackerask.com/posts/opnsense

Source: security-advisories@github.com

https://github.com/opnsense/core/security/advisories/GHSA-8pgr-x852-qx4j

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.