CVE-2026-53582

OPNsense: XPATH Injection can disclose any secret in config.xml

State: Published
Severity: 7.1 High
Published: Oct 15, 2026
Updated: Oct 16, 2026
Reserved: Jun 9, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:L	GitHub_M

Weaknesses

CWE-91 XML Injection (aka Blind XPath Injection)
CWE-643 Improper Neutralization of Data within XPath Expressions ('XPath Injection')

Affected Products

Product	Versions
coreopnsense	< 26.1.10Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.