What is CVE-2026-18369?

CVE-2026-18369 is a medium-severity vulnerability in Red Hat Certificate System 10, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-07-30.

How severe is CVE-2026-18369?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in Red Hat Certificate System 10

CVE-2026-18369

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…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

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-918 — Server-Side Request Forgery (SSRF)

References

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

Frequently asked questions

What is CVE-2026-18369?: CVE-2026-18369 is a medium-severity vulnerability in Red Hat Certificate System 10, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-07-30.
How severe is CVE-2026-18369?: Medium severity. CVSS v3 base score is 5.8 out of 10.