UDS Identity Config has a client authentication bypass in `ClientIdAndKubernetesSecretAuthenticator`_CVE-2026-46389

{
    "lastseen": "",
    "description": "UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the `client-kubernetes-secret` Keycloak client authenticator (shipped by `uds-identity-config` and consumed by UDS Core) causes the submitted `client_secret` to be overwritten with the mounted Kubernetes secret before comparison. An attacker who can reach the Keycloak token endpoint and knows a `client_id` using this authenticator can authenticate as that client with any `client_secret` value and obtain OAuth2 tokens scoped to the client's service account. In the case of the `uds-operator` client this token can be used to registry/modify other clients. Version 0.26.1 patches the issue.",
    "published": "2026-06-05T18:10:47.173Z",
    "modified": "2026-06-05T18:10:47.173Z",
    "type": "cve",
    "title": "UDS Identity Config has a client authentication bypass in `ClientIdAndKubernetesSecretAuthenticator`",
    "source": "GitHub_M",
    "references": "https://github.com/defenseunicorns/uds-identity-config/security/advisories/GHSA-8mg2-6588-r4hw\nhttps://github.com/defenseunicorns/uds-identity-config/releases/tag/v0.26.1",
    "id": "CVE-2026-46389",
    "bulletinFamily": "",
    "cwe": [
        "CWE-287",
        "CWE-303"
    ],
    "cvelist": null,
    "sourceData": "defenseunicorns uds-identity-config >= 0.11.0, < 0.26.1",
    "sourceHref": "",
    "cvss": {
        "score": 10,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "uds-identity-config",
    "version": ">= 0.11.0, < 0.26.1",
    "vendor": "defenseunicorns",
    "ai_description": "A logic error in the `client-kubernetes-secret` Keycloak client authenticator allows an attacker to authenticate as a client with any `client_secret` value.",
    "ai_severity": "Critical",
    "ai_vendor": "Defense Unicorns",
    "ai_product": "UDS Identity Config",
    "ai_version": "0.11.0-0.26.0",
    "ai_score": 10
}