Spring gRPC SecurityContext leaks across requests on authorization failure_CVE-2026-40968

{
    "lastseen": "",
    "description": "When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread. This may allow the subsequent user to gain escalated permissions.\n\nAffected versions:\nSpring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.",
    "published": "2026-04-28T13:42:35.525Z",
    "modified": "2026-04-28T14:36:35.953Z",
    "type": "cve",
    "title": "Spring gRPC SecurityContext leaks across requests on authorization failure",
    "source": "vmware",
    "references": "https://spring.io/security/cve-2026-40968",
    "id": "CVE-2026-40968",
    "bulletinFamily": "",
    "cwe": [
        "CWE-653"
    ],
    "cvelist": null,
    "sourceData": "Spring Spring gRPC 1.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "privilegesRequired": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Spring gRPC",
    "version": "1.0.0",
    "vendor": "Spring",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}