{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-34040",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-34040",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2023-08-24T12:59:20.620Z",
    "updatedAt": "2024-10-01T16:13:52.394Z",
    "importedAt": "2026-10-24T01:56:53.804Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Java Deserialization vulnerability in Spring-Kafka When Improperly Configured",
      "summary": "In Spring for Apache Kafka 3.0.9 and earlier and versions 2.9.10 and earlier, a possible deserialization attack vector existed, but only if unusual configuration was applied. An attacker would have to construct a malicious serialized object in one of the deserialization exception record headers.\n\nSpecifically, an application is vulnerable when all of the following are true:\n\n  *  The user does not configure an ErrorHandlingDeserializer for the key and/or value of the record\n  *  The user explicitly sets container properties checkDeserExWhenKeyNull and/or checkDeserExWhenValueNull container properties to true.\n  *  The user allows untrusted sources to publish to a Kafka topic\n\n\nBy default, these properties are false, and the container only attempts to deserialize the headers if an ErrorHandlingDeserializer is configured. The ErrorHandlingDeserializer prevents the vulnerability by removing any such malicious headers before processing the record.\n\n\n",
      "affected": [
        {
          "vendor": "Spring",
          "product": "Spring For Apache Kafka",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.8.x",
              "status": "affected",
              "versionType": "2.9.11",
              "lessThan": "2.9.11"
            },
            {
              "version": "2.9.x",
              "status": "affected",
              "versionType": "2.9.11",
              "lessThan": "2.9.11"
            },
            {
              "version": "3.0.x",
              "status": "affected",
              "versionType": "3.0.10",
              "lessThan": "3.0.10"
            }
          ]
        }
      ]
    }
  }
}