Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata_CVE-2026-1190

{
    "lastseen": "",
    "description": "A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language (SAML) setup, it fails to validate the `NotOnOrAfter` timestamp within the `SubjectConfirmationData`. This allows an attacker to delay the expiration of SAML responses, potentially extending the time a response is considered valid and leading to unexpected session durations or resource consumption.",
    "published": "2026-01-26T19:36:53.857Z",
    "modified": "2026-01-26T20:57:50.911Z",
    "type": "cve",
    "title": "Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-1190\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2430835",
    "id": "CVE-2026-1190",
    "bulletinFamily": "",
    "cwe": [
        "CWE-112"
    ],
    "cvelist": null,
    "sourceData": "",
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    "cvss": {
        "score": 3.1,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Red Hat Build of Keycloak",
    "version": "",
    "vendor": "Red Hat",
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    "ai_score": 0
}