{
  "public_date" : "2026-07-02T00:00:00Z",
  "bugzilla" : {
    "description" : "webrick: rubygem-webrick: WEBrick: Request smuggling via re-parsing of Content-Length header",
    "id" : "2496708",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2496708"
  },
  "cwe" : "CWE-444",
  "details" : [ "ruby webrick through v1.9.2 WEBrick reparses trailer Content-Length into canonical request state, enabling request smuggling. NOTE: the Supplier reports that \"The project README states that it is suitable for testing and development, and that its developers do not encourage its use to serve production web applications that may be subject to hostile input. It is not a production web server and is not intended to receive traffic from untrusted sources. Request smuggling is only reachable when WEBrick sits behind a proxy and receives hostile traffic in a production deployment, which is the configuration the project documents as discouraged.\"" ],
  "statement" : "This CVE has been marked as Rejected by the assigning CNA.",
  "affected_release" : [ {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-07-02T00:00:00Z",
    "advisory" : "RHSA-2026:34975",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "rust-main-1.96.1-1.hum1",
    "impact" : "critical"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat 3scale API Management Platform 2",
    "fix_state" : "Fix deferred",
    "package_name" : "3scale-amp2/backend-rhel8",
    "cpe" : "cpe:/a:redhat:red_hat_3scale_amp:2"
  }, {
    "product_name" : "Red Hat 3scale API Management Platform 2",
    "fix_state" : "Fix deferred",
    "package_name" : "3scale-amp2/system-rhel7",
    "cpe" : "cpe:/a:redhat:red_hat_3scale_amp:2"
  }, {
    "product_name" : "Red Hat 3scale API Management Platform 2",
    "fix_state" : "Fix deferred",
    "package_name" : "3scale-amp2/zync-rhel8",
    "cpe" : "cpe:/a:redhat:red_hat_3scale_amp:2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "pcs",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Satellite 6",
    "fix_state" : "Fix deferred",
    "package_name" : "rubygem-webrick",
    "cpe" : "cpe:/a:redhat:satellite:6"
  }, {
    "product_name" : "Red Hat Satellite 6",
    "fix_state" : "Fix deferred",
    "package_name" : "satellite-capsule:el8/rubygem-webrick",
    "cpe" : "cpe:/a:redhat:satellite:6"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-38969\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-38969\nhttps://github.com/advisories/GHSA-h4w6-wx8r-p68v\nhttps://github.com/ruby/webrick/issues/198\nhttps://github.com/ruby/webrick/pull/199" ],
  "name" : "CVE-2026-38969",
  "mitigation" : {
    "value" : "Do not expose WEBrick directly to untrusted network traffic. WEBrick is not designed for production use and should be replaced with a production-grade Ruby application server (e.g., Puma, Unicorn) behind a reverse proxy (e.g., nginx, Apache, HAProxy) that performs its own Content-Length validation and strips or rejects requests with conflicting transfer encoding headers.\nA patch is available: https://github.com/ruby/webrick/pull/199",
    "lang" : "en:us"
  },
  "csaw" : false
}