PT-2026-66452 · Red Hat · Red Hat Certificate System 10+7

CVE-2026-18369 · Published 2026-07-30 · Updated 2026-07-30

Mitre

CVSS v3.1

5.8

Medium

Base vector

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

A flaw was found in Dogtag PKI's ACME responder where the HTTP-01 challenge validator accepts IP address literals as dns identifiers and follows HTTP redirects without validating that the target is a public address. An unauthenticated ACME account holder can exploit this to perform server-side request forgery (SSRF), making the Dogtag server send HTTP GET requests to internal network services. With the InMemory database backend, the response body of internal targets is disclosed to the attacker through the ACME challenge error.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-18369

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-2026-18369 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-18369 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2509234 · Note