CVE-2026-1180: Keycloak adapter core Keycloak’s OpenID Connect Dynamic Client Vulnerability

MODERATE
Advisory Identifier: GHSA-7vw6-5q2f-7w5r
Share
CVSS 5.8
CWE-918
Published
Advisory Summary

CVE-2026-1180 is a MODERATE (CVSS 5.8) keycloak’s openid connect dynamic client vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Keycloak adapter core libraries in the Maven ecosystem. The issue involves keycloak’s openid connect dynamic client registration feature affected by server-side request forgery (ssrf). Remediation is available in the latest vendor maintenance releases.

CVE-2026-1180 at a Glance

CVE Identifier CVE-2026-1180
GHSA Identifier GHSA-7vw6-5q2f-7w5r
Severity MODERATE
CVSS v3.1 Base Score 5.8
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Keycloak adapter core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.8

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:N/S:C/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-1180

To remediate this vulnerability, upgrade all affected Keycloak adapter core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.keycloak:keycloak-adapter-core fixed: Latest secure release 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-adapter-core</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-1180, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Keycloak adapter core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), 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-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Keycloak adapter core, 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

A flaw was identified in Keycloak’s OpenID Connect Dynamic Client Registration feature when clients authenticate using private_key_jwt. The issue allows a client to specify an arbitrary jwks_uri, which Keycloak then retrieves without validating the destination. This enables attackers to coerce the Keycloak server into making HTTP requests to internal or restricted network resources. As a result, attackers can probe internal services and cloud metadata endpoints, creating an information disclosure and reconnaissance risk.

CVE-2026-1180 Affected Keycloak adapter core Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-adapter-core
maven/org.keycloak/keycloak-adapter-core
Maven
≤ 25.0.3

References

NVD — CVE-2026-1180 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1180
Keycloak adapter core Source Repository REPOSITORY
https://github.com/keycloak/keycloak/issues/45645
access.redhat.com/errata/rhsa-2026:64... WEB
https://access.redhat.com/errata/RHSA-2026:6477
access.redhat.com/errata/rhsa-2026:64... WEB
https://access.redhat.com/errata/RHSA-2026:6478
Keycloak adapter core Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-1180
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2430781
Keycloak adapter core Source Repository REPOSITORY
https://github.com/keycloak/keycloak

Frequently Asked Questions

What is CVE-2026-1180?
CVE-2026-1180 is a security vulnerability in Keycloak adapter core involving Keycloak’s OpenID Connect Dynamic Client Registration feature affected by Server-Side Request Forgery (SSRF) under CWE-918: Server-Side Request Forgery (SSRF).
Which Keycloak adapter core versions are affected?
Affected versions include releases prior to current release patches across affected packages: org.keycloak:keycloak-adapter-core.
What version fixes CVE-2026-1180?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-adapter-core affected?
Yes, org.keycloak:keycloak-adapter-core is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-1180?
CVE-2026-1180 has a CVSS v3.1 base score of 5.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
What CWE is associated with CVE-2026-1180?
CVE-2026-1180 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check Maven dependencies for CVE-2026-1180?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7vw6-5q2f-7w5r",
  "modified" : "2026-04-02T15:31:34Z",
  "published" : "2026-01-20T15:33:12Z",
  "aliases" : [ "CVE-2026-1180" ],
  "summary" : " Keycloak’s OpenID Connect Dynamic Client Registration feature affected by Server-Side Request Forgery (SSRF)",
  "details" : "A flaw was identified in Keycloak’s OpenID Connect Dynamic Client Registration feature when clients authenticate using private_key_jwt. The issue allows a client to specify an arbitrary jwks_uri, which Keycloak then retrieves without validating the destination. This enables attackers to coerce the Keycloak server into making HTTP requests to internal or restricted network resources. As a result, attackers can probe internal services and cloud metadata endpoints, creating an information disclosure and reconnaissance risk.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-adapter-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "25.0.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-1180"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/issues/45645"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:6477"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:6478"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-1180"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2430781"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-21T21:55:11Z",
    "nvd_published_at" : "2026-01-20T13:16:03Z"
  }
}