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        "state": "PUBLISHED",
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        "dateReserved": "2026-09-17T04:51:48.112Z",
        "datePublished": "2026-11-05T17:15:07.565Z",
        "dateUpdated": "2026-11-06T10:23:13.099Z"
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    "containers": {
        "cna": {
            "title": "Keycloak-services: keycloak-services: saml broker accepts holder-of-key assertions without proof of key possession",
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                    "other": {
                        "content": {
                            "value": "Important",
                            "namespace": "https://access.redhat.com/security/updates/classification/"
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                        "type": "Red Hat severity rating"
                    }
                },
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A flaw was found in the SAML identity broker component of Keycloak, which is used to delegate authentication to external identity providers. The issue occurs because the broker fails to verify that a user actually possesses the private key associated with a holder-of-key assertion. An attacker who intercepts a victim signed assertion can replay it to gain unauthorized access and impersonate the victim without needing their private key."
                }
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                    "vendor": "Red Hat",
                    "product": "Red Hat build of Keycloak 26.4",
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                    "packageName": "keycloak-rhel9-container",
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                    "packageName": "keycloak-rhel9-operator-bundle-container",
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                            "version": "26.4.17-2",
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                    "defaultStatus": "unaffected",
                    "packageName": "keycloak/rhbk-openshift-rhel9",
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            "references": [
                {
                    "url": "https://access.redhat.com/errata/RHSA-2026:95760",
                    "name": "RHSA-2026:95760",
                    "tags": [
                        "vendor-advisory",
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                    "name": "RHBZ#2535814",
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            "datePublic": "2026-11-05T00:00:00.000Z",
            "problemTypes": [
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                            "cweId": "CWE-287",
                            "description": "Improper Authentication",
                            "lang": "en",
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            "workarounds": [
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                    "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
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                    "lang": "en",
                    "time": "2026-09-16T13:45:07.000Z",
                    "value": "Reported to Red Hat."
                },
                {
                    "lang": "en",
                    "time": "2026-11-05T00:00:00.000Z",
                    "value": "Made public."
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Red Hat would like to thank yd1ng for reporting this issue."
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