CVE-2026-7504: Keycloak Open Redirect When Using Wildcard Vulnerability
HIGHCVE-2026-7504 is a HIGH (CVSS 8.1) open redirect when using wildcard vulnerability (CWE-601: URL Redirection to Untrusted Site ('Open Redirect')) affecting Keycloak libraries in the Maven ecosystem. The issue involves open redirect when using wildcard valid redirect uris in keycloak. Remediation is available by upgrading affected packages to version 26.6.2.
CVE-2026-7504 at a Glance
Security Impact
CVSS: 8.1
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N).
How to Fix CVE-2026-7504
To remediate this vulnerability, upgrade all affected Keycloak dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.keycloak</groupId>
<artifactId>keycloak-services</artifactId>
<version>26.6.2</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.keycloakHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-7504, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.keycloakAnalyze the terminal output to locate any version of Keycloak in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.6.2), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-601: URL Redirection to Untrusted Site ('Open Redirect'), where the web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. In Keycloak, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-7504 Affected Keycloak Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.keycloak:keycloak-services
|
Maven |
< 26.6.2
|
26.6.2
|
References
Frequently Asked Questions
What is CVE-2026-7504?
Which Keycloak versions are affected?
What version fixes CVE-2026-7504?
Is keycloak-services affected?
What is the CVSS score of CVE-2026-7504?
What CWE is associated with CVE-2026-7504?
How can I check Maven dependencies for CVE-2026-7504?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-rp95-xpg9-c2cq",
"modified" : "2026-06-04T15:38:01Z",
"published" : "2026-05-19T12:31:42Z",
"aliases" : [ "CVE-2026-7504" ],
"summary" : "Keycloak: Open redirect when using wildcard valid redirect URIs in Keycloak",
"details" : "A flaw was found in Keycloak's URL validation logic during redirect operations. By crafting a malicious request, an attacker could bypass validation to redirect users to unauthorized URLs, potentially leading to the exposure of sensitive information within the domain or facilitating further attacks. This vulnerability specifically affects Keycloak clients configured with a wildcard (*) in the \"Valid Redirect URIs\" field and requires user interaction to be successfully exploited.\n\nThe issue stems from a discrepancy in how Keycloak and the underlying Java URI implementation handle the user-info component of a URL. If a malicious redirect URL is constructed using multiple @ characters in the user-info section, Java's URI parser fails to extract the user-info, leaving only the raw authority field. Consequently, Keycloak's validation check fails to detect the malformed user-info, falls back to a wildcard comparison, and incorrectly permits the malicious redirect.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.keycloak:keycloak-services"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "26.6.2"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-7504"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/pull/49130"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/commit/479620769073ac36b782dee65086ab35e8e5d14e"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:19594"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:19595"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:19596"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2026:19597"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/security/cve/CVE-2026-7504"
}, {
"type" : "WEB",
"url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2464128"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/keycloak/keycloak"
}, {
"type" : "WEB",
"url" : "https://github.com/keycloak/keycloak/releases/tag/26.6.2"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-601" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-06-04T15:38:01Z",
"nvd_published_at" : "2026-05-19T12:16:19Z"
}
}