GHSA-wmxr-6j5f-838p: Duplicate Advisory Keycloak: Unauthorized Access Vulnerability

HIGH
Share
CVSS 7.7
CWE-1287
Published
Advisory Summary

GHSA-wmxr-6j5f-838p is a HIGH (CVSS 7.7) keycloak: unauthorized access vulnerability (CWE-1287: Improper Validation of Specified Type of Input) affecting Duplicate Advisory libraries in the Maven ecosystem. The issue involves keycloak: unauthorized access via improper validation of encrypted saml assertions. Remediation is available by upgrading affected packages to version 26.2.14, 26.4.10, 26.5.5.

GHSA-wmxr-6j5f-838p at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-wmxr-6j5f-838p
Severity HIGH
CVSS v3.1 Base Score 7.7
CWE Classification CWE-1287: Improper Validation of Specified Type of Input
Affected Product Duplicate Advisory
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L).

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

How to Fix GHSA-wmxr-6j5f-838p

To remediate this vulnerability, upgrade all affected Duplicate Advisory 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-services fixed: 26.2.14 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>26.2.14</version>
</dependency>
org.keycloak:keycloak-saml-adapter-core fixed: 26.2.14 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-adapter-core</artifactId>
    <version>26.2.14</version>
</dependency>
org.keycloak:keycloak-saml-core fixed: 26.4.10 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-core</artifactId>
    <version>26.4.10</version>
</dependency>
org.keycloak:keycloak-services fixed: 26.5.5 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>26.5.5</version>
</dependency>
org.keycloak:keycloak-saml-adapter-core fixed: 26.4.10 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-adapter-core</artifactId>
    <version>26.4.10</version>
</dependency>
org.keycloak:keycloak-saml-adapter-core fixed: 26.5.5 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-adapter-core</artifactId>
    <version>26.5.5</version>
</dependency>
org.keycloak:keycloak-services fixed: 26.4.10 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-services</artifactId>
    <version>26.4.10</version>
</dependency>
org.keycloak:keycloak-saml-core fixed: 26.2.14 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-core</artifactId>
    <version>26.2.14</version>
</dependency>
org.keycloak:keycloak-saml-core fixed: 26.5.5 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-saml-core</artifactId>
    <version>26.5.5</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 GHSA-wmxr-6j5f-838p, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 26.2.14), 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-1287: Improper Validation of Specified Type of Input, where the product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type. In Duplicate Advisory, 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

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-794g-x443-36f7. This link is maintained to preserve external references. ### Original Description A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.

GHSA-wmxr-6j5f-838p Affected Duplicate Advisory Versions

9 component(s)
Fixed Versions:
26.2.1426.4.1026.5.5
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
< 26.2.14
26.2.14
org.keycloak:keycloak-saml-adapter-core
maven/org.keycloak/keycloak-saml-adapter-core
Maven
< 26.2.14
26.2.14
org.keycloak:keycloak-saml-core
maven/org.keycloak/keycloak-saml-core
Maven
≥ 26.3.0
< 26.4.10
26.4.10
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
≥ 26.5.0
< 26.5.5
26.5.5
org.keycloak:keycloak-saml-adapter-core
maven/org.keycloak/keycloak-saml-adapter-core
Maven
≥ 26.3.0
< 26.4.10
26.4.10
org.keycloak:keycloak-saml-adapter-core
maven/org.keycloak/keycloak-saml-adapter-core
Maven
≥ 26.5.0
< 26.5.5
26.5.5
org.keycloak:keycloak-services
maven/org.keycloak/keycloak-services
Maven
≥ 26.3.0
< 26.4.10
26.4.10
org.keycloak:keycloak-saml-core
maven/org.keycloak/keycloak-saml-core
Maven
< 26.2.14
26.2.14
org.keycloak:keycloak-saml-core
maven/org.keycloak/keycloak-saml-core
Maven
≥ 26.5.0
< 26.5.5
26.5.5

References

NVD — GHSA-wmxr-6j5f-838p NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2092
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/b40a25908d937bb0563ea516487bc2c7c1d92508
access.redhat.com/errata/rhsa-2026:39... WEB
https://access.redhat.com/errata/RHSA-2026:3925
access.redhat.com/errata/rhsa-2026:39... WEB
https://access.redhat.com/errata/RHSA-2026:3926
access.redhat.com/errata/rhsa-2026:39... WEB
https://access.redhat.com/errata/RHSA-2026:3947
access.redhat.com/errata/rhsa-2026:39... WEB
https://access.redhat.com/errata/RHSA-2026:3948
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76128
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76129
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76130
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76132
access.redhat.com/errata/rhsa-2026:76... WEB
https://access.redhat.com/errata/RHSA-2026:76134
Duplicate Advisory Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-2092
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2437296
Duplicate Advisory Source Repository REPOSITORY
https://github.com/keycloak/keycloak
Duplicate Advisory Security Information SECURITY
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2092.json

Frequently Asked Questions

What is GHSA-wmxr-6j5f-838p?
GHSA-wmxr-6j5f-838p is a security vulnerability in Duplicate Advisory involving Keycloak: Unauthorized access via improper validation of encrypted SAML assertions under CWE-1287: Improper Validation of Specified Type of Input.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 26.2.14, 26.4.10, 26.5.5 across affected packages: org.keycloak:keycloak-services, org.keycloak:keycloak-saml-adapter-core, org.keycloak:keycloak-saml-core.
What version fixes GHSA-wmxr-6j5f-838p?
Upgrading to 26.2.14, 26.4.10, 26.5.5 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-services affected?
Yes, org.keycloak:keycloak-services is affected in releases prior to 26.2.14, 26.5.5, 26.4.10. Upgrade your dependency to 26.2.14, 26.5.5, 26.4.10 or later.
Is keycloak-saml-adapter-core affected?
Yes, org.keycloak:keycloak-saml-adapter-core is affected in releases prior to 26.2.14, 26.4.10, 26.5.5. Upgrade your dependency to 26.2.14, 26.4.10, 26.5.5 or later.
What is the CVSS score of GHSA-wmxr-6j5f-838p?
GHSA-wmxr-6j5f-838p has a CVSS v3.1 base score of 7.7 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L.
What CWE is associated with GHSA-wmxr-6j5f-838p?
GHSA-wmxr-6j5f-838p is classified under CWE-1287: Improper Validation of Specified Type of Input (The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.).
How can I check Maven dependencies for GHSA-wmxr-6j5f-838p?
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-wmxr-6j5f-838p",
  "modified" : "2026-10-06T18:31:15Z",
  "published" : "2026-03-18T03:32:09Z",
  "withdrawn" : "2026-07-02T20:42:16Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Keycloak: Unauthorized access via improper validation of encrypted SAML assertions",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-794g-x443-36f7. This link is maintained to preserve external references.\n\n### Original Description\nA flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-adapter-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.2.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.3.0"
      }, {
        "fixed" : "26.4.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.5.0"
      }, {
        "fixed" : "26.5.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-adapter-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.3.0"
      }, {
        "fixed" : "26.4.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-adapter-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.5.0"
      }, {
        "fixed" : "26.5.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.2.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-services"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.3.0"
      }, {
        "fixed" : "26.4.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "26.2.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-saml-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "26.5.0"
      }, {
        "fixed" : "26.5.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-2092"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/b40a25908d937bb0563ea516487bc2c7c1d92508"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:3925"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:3926"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:3947"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:3948"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:76128"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:76129"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:76130"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:76132"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2026:76134"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-2092"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2437296"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  }, {
    "type" : "WEB",
    "url" : "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2092.json"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1287" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-18T20:17:21Z",
    "nvd_published_at" : "2026-03-18T02:16:24Z"
  }
}