{
  "threat_severity" : "Important",
  "public_date" : "2026-07-27T19:27:58Z",
  "bugzilla" : {
    "description" : "next: Next.js: Server-Side Request Forgery via malicious host redirection in Server Actions",
    "id" : "2507639",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2507639"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.2",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
    "status" : "verified"
  },
  "cwe" : "CWE-918",
  "details" : [ "Next.js is a React framework for building full-stack web applications. In versions 14.1.1 through 15.5.20 and 16.0.0 through 16.2.10, when a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host (Server-Side Request Forgery). This requires the attacker's request to control Host-associated headers. In some configurations, it's also possible to obtain internal values that weaken middleware/proxy authorization. Applications that use Server Actions are affected when the incoming host header is not fixed to a trusted value. This typically occurs on custom servers, or on deployments not behind a proxy that pins the host. Managed hosting pins the host upstream and is not affected; next start and standalone output do the same from version 14.2 onward. This issue has been fixed in versions 15.5.21 and 16.2.11.", "A flaw was found in Next.js, a framework for building web applications. A remote attacker can exploit this vulnerability by manipulating Host-associated headers when a Server Action forwards or redirects a request. This can lead to Server-Side Request Forgery (SSRF), where the server is tricked into making requests to an attacker-controlled host. Such an attack could potentially expose internal system information or bypass authorization controls." ],
  "statement" : "This Important Server-Side Request Forgery (SSRF) flaw in Next.js Server Actions allows an attacker to redirect outbound requests to a malicious host. This is particularly relevant for Red Hat customers deploying Next.js applications on custom servers or without a proxy that enforces host header validation, as it could lead to unauthorized internal network access or information disclosure. Managed hosting environments and applications using `next start` or standalone output from version 14.2 onwards are not affected.",
  "affected_release" : [ {
    "product_name" : "Streams for Apache Kafka 3.2.1",
    "release_date" : "2026-08-12T00:00:00Z",
    "advisory" : "RHSA-2026:54435",
    "cpe" : "cpe:/a:redhat:amq_streams:3.2::el9",
    "package" : "next",
    "impact" : "important"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "thunderbird",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/bootc-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/bootc-gaudi-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/bootc-rocm-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "fix_state" : "Affected",
    "package_name" : "rhelai3/disk-image-cuda-rhel9",
    "cpe" : "cpe:/a:redhat:enterprise_linux_ai:3",
    "impact" : "important"
  }, {
    "product_name" : "Red Hat Trusted Artifact Signer",
    "fix_state" : "Not affected",
    "package_name" : "rhtas/rekor-search-ui-rhel9",
    "cpe" : "cpe:/a:redhat:trusted_artifact_signer:1"
  }, {
    "product_name" : "streams for Apache Kafka 2",
    "fix_state" : "Affected",
    "package_name" : "next",
    "cpe" : "cpe:/a:redhat:amq_streams:2",
    "impact" : "important"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-64649\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64649\nhttps://github.com/vercel/next.js/commit/b51206321854193208c0805ba42acc49287f942b\nhttps://github.com/vercel/next.js/commit/e3e5666ccead3a15162793d697af5e48b7cc0498\nhttps://github.com/vercel/next.js/releases/tag/v15.5.21\nhttps://github.com/vercel/next.js/releases/tag/v16.2.11\nhttps://github.com/vercel/next.js/security/advisories/GHSA-89xv-2m56-2m9x" ],
  "name" : "CVE-2026-64649",
  "csaw" : false
}