{
  "threat_severity" : "Important",
  "public_date" : "2026-07-03T06:13:04Z",
  "bugzilla" : {
    "description" : "curl: curl: Denial of Service via WebSocket PING flood",
    "id" : "2496753",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2496753"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-770",
  "details" : [ "By default, curl automatically responds to WebSocket PING frames. Because curl\nlacks an upper bound on memory allocation for unacknowledged frames, a\nmalicious server can exhaust all available memory by flooding curl with rapid,\nsequential PING messages.", "A flaw was found in curl. A malicious server can exploit this vulnerability by sending rapid, sequential WebSocket PING messages. Due to a lack of an upper bound on memory allocation for unacknowledged frames, curl can be forced to exhaust all available memory, leading to a denial of service." ],
  "statement" : "This Important denial of service vulnerability in curl allows a remote malicious server to exhaust system memory. By default, curl automatically responds to WebSocket PING frames without an upper bound on memory allocation, enabling an attacker to trigger resource exhaustion and cause service unavailability in affected Red Hat products.",
  "affected_release" : [ {
    "product_name" : "Red Hat Hardened Images",
    "release_date" : "2026-06-24T00:00:00Z",
    "advisory" : "RHSA-2026:29017",
    "cpe" : "cpe:/a:redhat:hummingbird:1",
    "package" : "curl-main-8.21.0-0.1.hum1",
    "impact" : "important"
  }, {
    "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" : "important"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "curl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Not affected",
    "package_name" : "openshift/ose-rhel-coreos-8",
    "cpe" : "cpe:/a:redhat:openshift:4"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Not affected",
    "package_name" : "openshift/ose-rhel-coreos-9",
    "cpe" : "cpe:/a:redhat:openshift:4"
  }, {
    "product_name" : "Red Hat OpenShift Dev Spaces",
    "fix_state" : "Not affected",
    "package_name" : "devspaces/code-rhel9",
    "cpe" : "cpe:/a:redhat:openshift_devspaces:3"
  }, {
    "product_name" : "Red Hat Trusted Profile Analyzer",
    "fix_state" : "Not affected",
    "package_name" : "rhtpa/rhtpa-trustification-service-rhel9",
    "cpe" : "cpe:/a:redhat:trusted_profile_analyzer:2"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-11586\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-11586\nhttps://curl.se/docs/CVE-2026-11586.html\nhttps://curl.se/docs/CVE-2026-11586.json\nhttps://hackerone.com/reports/3788931" ],
  "name" : "CVE-2026-11586",
  "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
}