What is CVE-2026-53682?

CVE-2026-53682 is a medium-severity vulnerability in Red Hat Certificate System 9, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 5.3/10. Published 2026-09-01.

How severe is CVE-2026-53682?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Red Hat Certificate System 9

CVE-2026-53682

An unauthenticated client can query the Security Domain hosts inventory via GET /ca/rest/securityDomain/hosts and receive a structured response enumerating internal PKI/CA hosts and roles (security domain topology and participating subsystems), without requiring a principal, client certificate, or session.

Published 2026-09-01 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.4th percentile), scored 2026-10-17.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

Weakness classification (CWE)

References

access.redhat.com/security/cve/CVE-2026-53682 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-53682?: CVE-2026-53682 is a medium-severity vulnerability in Red Hat Certificate System 9, classified under Exposure of Sensitive System Information to an Unauthorized Control Sphere. CVSS score: 5.3/10. Published 2026-09-01.
How severe is CVE-2026-53682?: Medium severity. CVSS v3 base score is 5.3 out of 10.