CVE-2026-53582: high-severity vulnerability in opnsense core
OPNsense: XPATH Injection can disclose any secret in config.xml
Published · Updated
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.1epss 0.7%
from disclosure to weapon0 days
Published on NVDOct 15
1st PoCJun 16
exploitation probability
0.7%top 47% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:L
Affected products
opnsense · corepublic PoCs found — 1
githubgithub.com/eev4n/CVE-2026-53582★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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