CVE-2026-1609

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Source
https://cve.org/CVERecord?id=CVE-2026-1609
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1609.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-1609
Aliases
Published
2026-07-16T00:26:10Z
Modified
2026-11-04T02:47:31Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Details

A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.

Database specific 
{
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1609.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "26.5.0"
                        },
                        {
                            "fixed": "26.5.3"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/keycloak/keycloak

Affected ranges

Type
GIT
Repo
https://github.com/keycloak/keycloak
Events
Introduced
4c5b05789e16ec963e9477ce1f58118ca89c4d6e
Fixed
a09588d41f2c94baf4729db5ef60521430c51cf8
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:redhat:build_of_keycloak:26.5.2:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "26.5.2"
                },
                {
                    "last_affected": "26.5.2"
                }
            ],
            "source": "CPE_STRING"
        },
        {
            "original_tag": "26.5.3",
            "range": [
                {
                    "fixed": "a09588d41f2c94baf4729db5ef60521430c51cf8"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

26.*
26.5.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1609.json"