CVE-2026-44193: OPNsense: RCE via XMLRPC endpoint using `opnsense.restore_config_section` method

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-13 · updated 2026-10-26
Weakness: CWE-88

Description

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.7, the XMLRPC method opnsense.restore_config_section fails to sanitize user supplied input leading to Remote Code Execution. This vulnerability is fixed in 26.1.7.

Affected products

OPNsense: before 26.1.7 — fixed in 26.1.7

How to fix

Upgrade to a fixed version: OPNsense 26.1.7. Check the vendor advisory for mitigations.

References

https://github.com/opnsense/core/security/advisories/GHSA-xxp9-93cr-x54p
https://github.com/opnsense/core/security/advisories/GHSA-xxp9-93cr-x54p

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