CVE-2026-53582

OPNsense is a FreeBSD based firewall and routing platform. Prior to version 26.1.10, the Trust module stores attacker-controlled certificate authority and certificate refid values and interpolates them into XPath expressions in src/opnsense/mvc/app/models/OPNsense/Trust/FieldTypes/CAsField.php and src/opnsense/mvc/app/models/OPNsense/Trust/FieldTypes/CertificatesField.php. A user with CA Manager or Certificate Manager privileges can submit a crafted refid and repeatedly retrieve the object to obtain a boolean refcount oracle, allowing values in config.xml to be recovered character by character. Exposed values can include password hashes, API credentials, certificate private keys, VPN key material, and high-availability credentials, enabling privilege escalation and compromise of other security domains. This issue is fixed in version 26.1.10.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/opnsense/core/commit/e2cd067343511252fb0d391a17d82d3ecceece45
https://github.com/opnsense/core/commit/fc2f0d745c17855d2027b192fd4e3fa913e26859
https://github.com/opnsense/core/security/advisories/GHSA-xww7-76m6-mh2r
http://seclists.org/fulldisclosure/2026/Jul/18

Configurations

No configuration.

History

15 Oct 2026, 16:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 16:18

Updated : 2026-10-16 18:17

NVD link : CVE-2026-53582

Mitre link : CVE-2026-53582

CVE.ORG link : CVE-2026-53582

JSON object : View

Products Affected

No product.

CWE

CWE-91

XML Injection (aka Blind XPath Injection)

CWE-643

Improper Neutralization of Data within XPath Expressions ('XPath Injection')

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