In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header_CVE-2026-41726

{
    "lastseen": "",
    "description": "When an application opts into DelegatingDeserializer, a producer can grow the consumer's heap without bound by sending records with unique random spring.kafka.serialization.selector header values, eventually causing GC thrash and OutOfMemoryError.\n\nAffected versions:\nSpring for Apache Kafka 4.0.0 through 4.0.5; 3.3.0 through 3.3.15; 3.2.0 through 3.2.13; 2.9.0 through 2.9.13; 2.8.0 through 2.8.11.",
    "published": "2026-06-09T23:48:51.048Z",
    "modified": "2026-06-09T23:48:51.048Z",
    "type": "cve",
    "title": "In Spring for Apache Kafka, unbounded delegate cache keyed on user-controlled, potentially malicious selector header",
    "source": "vmware",
    "references": "https://spring.io/security/cve-2026-41726",
    "id": "CVE-2026-41726",
    "bulletinFamily": "",
    "cwe": [
        "CWE-770"
    ],
    "cvelist": null,
    "sourceData": "Spring Spring for Apache Kafka 4.0.0\nSpring Spring for Apache Kafka 3.3.0\nSpring Spring for Apache Kafka 3.2.0\nSpring Spring for Apache Kafka 2.9.0\nSpring Spring for Apache Kafka 2.8.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Spring for Apache Kafka",
    "version": "4.0.0",
    "vendor": "Spring",
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    "ai_score": 0
}