What is CVE-2026-18217?

CVE-2026-18217 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 3.4/10. Published 2026-07-31.

How severe is CVE-2026-18217?

Low severity. CVSS v3 base score is 3.4 out of 10.

Improper input validation in Red Hat Build Of Keycloak

CVE-2026-18217

A flaw was found in the SAML protocol implementation of Keycloak, an open-source identity and access management solution. The issue occurs when Keycloak handles SAML authentication requests using the HTTP-Redirect binding. If a client is c…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:N.

Affected products

Red Hat Build Of Keycloak
Red Hat Data Grid 8
Red Hat Jboss Enterprise Application Platform Expansion Pack
Red Hat Single Sign-on 7

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2026-18217?: CVE-2026-18217 is a low-severity vulnerability in Red Hat Build Of Keycloak, classified under Improper Input Validation. CVSS score: 3.4/10. Published 2026-07-31.
How severe is CVE-2026-18217?: Low severity. CVSS v3 base score is 3.4 out of 10.