{
  "threat_severity" : "Important",
  "public_date" : "2025-08-27T00:00:00Z",
  "bugzilla" : {
    "description" : "undertow: Undertow: Request Smuggling via Malformed HTTP Request Headers",
    "id" : "2443262",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2443262"
  },
  "cvss3" : {
    "cvss3_base_score" : "8.7",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
    "status" : "draft"
  },
  "cwe" : "CWE-444",
  "details" : [ "A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure.", "A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, can be exploited by a remote attacker to perform request smuggling. Request smuggling allows an attacker to bypass security mechanisms, access restricted information, or manipulate web caches, potentially leading to unauthorized actions or data exposure." ],
  "package_state" : [ {
    "product_name" : "Red Hat build of Apache Camel for Spring Boot 4",
    "fix_state" : "Affected",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:camel_spring_boot:4"
  }, {
    "product_name" : "Red Hat build of Apache Camel - HawtIO 4",
    "fix_state" : "Not affected",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:apache_camel_hawtio:4"
  }, {
    "product_name" : "Red Hat Data Grid 8",
    "fix_state" : "Will not fix",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:jboss_data_grid:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "moditect",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "pki-core:10.6/resteasy",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "pki-deps:10.6/resteasy",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "resteasy",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Fuse 7",
    "fix_state" : "Will not fix",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:jboss_fuse:7"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 7",
    "fix_state" : "Will not fix",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:7"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 8",
    "fix_state" : "Affected",
    "package_name" : "org.jberet-jberet-parent",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:8"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 8",
    "fix_state" : "Affected",
    "package_name" : "org.jboss.eap-jboss-eap-xp",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:8"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform 8",
    "fix_state" : "Affected",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_application_platform:8"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform Expansion Pack",
    "fix_state" : "Affected",
    "package_name" : "org.jberet-jberet-parent",
    "cpe" : "cpe:/a:redhat:jbosseapxp"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform Expansion Pack",
    "fix_state" : "Affected",
    "package_name" : "org.jboss.eap-jboss-eap-xp",
    "cpe" : "cpe:/a:redhat:jbosseapxp"
  }, {
    "product_name" : "Red Hat JBoss Enterprise Application Platform Expansion Pack",
    "fix_state" : "Affected",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:jbosseapxp"
  }, {
    "product_name" : "Red Hat Process Automation 7",
    "fix_state" : "Affected",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
  }, {
    "product_name" : "Red Hat Single Sign-On 7",
    "fix_state" : "Affected",
    "package_name" : "undertow-core",
    "cpe" : "cpe:/a:redhat:red_hat_single_sign_on:7"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-28369\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-28369" ],
  "name" : "CVE-2026-28369",
  "csaw" : false
}