CVE-2026-53582 OPNsense: XPATH Injection can disclose any secret in config.xml
Privileged users can exploit XPath injection in the Trust module to extract sensitive secrets like keys and credentials from the configuration file.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53582?
CVE-2026-53582 is a high-severity vulnerability in opnsense core, published on 15 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-53582?
How do I fix CVE-2026-53582?
No fix has been published for CVE-2026-53582 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-53582 being exploited?
There is no known exploitation of CVE-2026-53582 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-xww7-76m6-mh2r.