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        "state": "PUBLISHED",
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        "dateReserved": "2026-05-28T03:09:25.012Z",
        "datePublished": "2026-05-28T03:44:18.671Z",
        "dateUpdated": "2026-06-10T21:21:59.570Z"
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        "cna": {
            "title": "Keycloak: keycloak: security restriction bypass allows unauthorized ropc token acquisition",
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                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "LOW",
                        "integrityImpact": "LOW",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
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            "descriptions": [
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                    "lang": "en",
                    "value": "A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure."
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            ],
            "affected": [
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                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.6",
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                    "packageName": "rhbk/keycloak-operator-bundle",
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                    "versions": [
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                            "version": "26.6.3-3",
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                            "versionType": "rpm",
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            "references": [
                {
                    "url": "https://access.redhat.com/errata/RHSA-2026:25097",
                    "name": "RHSA-2026:25097",
                    "tags": [
                        "vendor-advisory",
                        "x_refsource_REDHAT"
                    ]
                },
                {
                    "url": "https://access.redhat.com/errata/RHSA-2026:25098",
                    "name": "RHSA-2026:25098",
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                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482459",
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            "datePublic": "2026-05-28T03:10:21.828Z",
            "problemTypes": [
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                    "descriptions": [
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                            "cweId": "CWE-280",
                            "description": "Improper Handling of Insufficient Permissions or Privileges",
                            "lang": "en",
                            "type": "CWE"
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                    ]
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            ],
            "x_redhatCweChain": "CWE-280: Improper Handling of Insufficient Permissions or Privileges",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "To mitigate this issue, Keycloak administrators should review and adjust client policies designed to reject Resource Owner Password Credentials (ROPC) grants. Avoid using the `client-type`, `client-roles`, `client-attributes`, or `client-scopes` condition providers in conjunction with the `reject-ropc-grant` executor. Instead, configure policies to use the `grant-type` condition provider for ROPC rejection. A restart or reload of the Keycloak service may be required for these policy changes to take full effect."
                }
            ],
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                {
                    "lang": "en",
                    "time": "2026-05-28T03:09:09.710Z",
                    "value": "Reported to Red Hat."
                },
                {
                    "lang": "en",
                    "time": "2026-05-28T03:10:21.828Z",
                    "value": "Made public."
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Red Hat would like to thank Evan Hendra (Independent Security Researcher) for reporting this issue."
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