What is CVE-2026-18047?

CVE-2026-18047 is a medium-severity vulnerability in Red Hat Certificate System 10, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 6.5/10. Published 2026-07-28.

How severe is CVE-2026-18047?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Red Hat Certificate System 10

CVE-2026-18047

A flaw was found in Dogtag PKI's ACME responder where the web.xml security constraints use exact URL pattern matching for admin-only enable/disable endpoints. By appending a trailing slash to the URL, an unauthenticated attacker can bypass…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Red Hat Certificate System 10
Red Hat Certificate System 11
Red Hat Certificate System 9
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-18047?: CVE-2026-18047 is a medium-severity vulnerability in Red Hat Certificate System 10, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 6.5/10. Published 2026-07-28.
How severe is CVE-2026-18047?: Medium severity. CVSS v3 base score is 6.5 out of 10.