cbcvebase.
CVE-2026-9086
published 2026-06-25

CVE-2026-9086: A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with `manage-client` permission or access to client…

PriorityP345high7.3CVSS 3.1
AVNACLPRLUIRSUCHIHAN
EPSS
0.42%
34.0th percentile
A flaw was found in Keycloak. A remote attacker with administrative privileges, specifically those with `manage-client` permission or access to client registration endpoints, could bypass client Uniform Resource Identifier (URI) validation. This is achieved by registering a malicious client with a specially crafted redirect URI using a case-insensitive `javascript:` or `data:` scheme. This Cross-Site Scripting (XSS) vulnerability allows for arbitrary code execution in the Keycloak origin when a victim clicks the crafted link, such as in the logout flow or the Admin Console.

Affected

6 ranges
VendorProductVersion rangeFixed in
redhatbuild_of_keycloak>= 26.4 < 26.4.1326.4.13
redhatbuild_of_keycloak>= 26.6 < 26.6.426.6.4
rhbkkeycloak-operator-bundle_26.6.4-2
rhbkkeycloak-rhel9
rhbkkeycloak-rhel9-operator_26.6-8
rhbkkeycloak-rhel9_26.6-8

CVSS provenance

nvdv3.17.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
vendor_oracle7.5HIGH
vendor_redhat7.3HIGH
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