PT-2026-65459 · Red Hat · Red Hat Certificate System 10+7

CVE-2026-18047 · Published 2026-07-28 · Updated 2026-07-28

Mitre

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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 the Tomcat authentication constraint while RESTEasy still routes the request to the handler, allowing unauthorized toggling of the ACME service state including persistent denial of service.

Fix

Authentication Bypass Using an Alternate Path or Channel

Weakness Enumeration

CWE-288

Related Identifiers

CVE-2026-18047

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

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-18047 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2507956 · Note
• https://access.redhat.com/security/cve/CVE-2026-18047 · Note