{
  "threat_severity" : "Moderate",
  "public_date" : "2026-05-13T18:04:03Z",
  "bugzilla" : {
    "description" : "netty: Netty: Request smuggling via chunk size parser integer overflow",
    "id" : "2477214",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2477214"
  },
  "cvss3" : {
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    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
    "status" : "draft"
  },
  "cwe" : "CWE-190",
  "details" : [ "Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's chunk size parser silently overflows int, enabling request smuggling attacks. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.", "A flaw was found in Netty, an asynchronous, event-driven network application framework. A remote attacker could exploit an integer overflow vulnerability in Netty's chunk size parser. This flaw enables request smuggling attacks, which can allow an attacker to bypass security controls or access unauthorized information." ],
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  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-42580\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-42580\nhttps://github.com/netty/netty/security/advisories/GHSA-m4cv-j2px-7723" ],
  "name" : "CVE-2026-42580",
  "mitigation" : {
    "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.",
    "lang" : "en:us"
  },
  "csaw" : false
}