{"id":"CVE-2026-53582","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-53582","generatedAt":"2026-10-28T03:58:05.918Z","title":"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…","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.","published":"2026-10-15T16:18:13.000Z","lastModified":"2026-10-16T18:17:58.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:L"},"cwe":["CWE-91","CWE-643"],"affected":[],"epss":{"score":0.00726,"percentile":0.53921,"date":"2026-10-27","history":[{"date":"2026-10-16","score":0.00726,"percentile":0.53199}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T16:18:13.000Z","detail":{"score":"7.1","severity":"HIGH","publishedAt":"2026-10-15T16:18:12.827Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://github.com/opnsense/core/commit/e2cd067343511252fb0d391a17d82d3ecceece45","source":"security-advisories@github.com"},{"url":"https://github.com/opnsense/core/commit/fc2f0d745c17855d2027b192fd4e3fa913e26859","source":"security-advisories@github.com"},{"url":"https://github.com/opnsense/core/security/advisories/GHSA-xww7-76m6-mh2r","source":"security-advisories@github.com"},{"url":"http://seclists.org/fulldisclosure/2026/Jul/18","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53582","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}