{"id":"CVE-2026-28367","title":"A flaw was found in Undertow","summary":"A flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\\r\\r\\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic …","severity":"high","cvss":8.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","cwe":["CWE-444"],"vendor":"redhat","product":"build_of_apache_camel_-_hawtio","affected":["build_of_apache_camel_-_hawtio = 4.0","build_of_apache_camel_for_spring_boot = 4.0","data_grid = 8.0","fuse = 7.0.0","jboss_enterprise_application_platform = 7.0.0","jboss_enterprise_application_platform = 8.0.0","jboss_enterprise_application_platform_expansion_pack","process_automation = 7.0","single_sign-on = 7.0","undertow"],"published":"2026-03-27","updated":"2026-09-21","sourceUpdated":"2026-09-21T14:17:15.060","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-28367","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:25125","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:25126","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-28367","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2443260","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28367.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-28367"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28367"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-03-31T13:27:40.351547Z"},"epss":0.00706,"epssPercentile":0.51552,"ingestedAt":"2026-06-29T13:24:34.815Z","patched":["jboss_eap_8_1_for_rhel 8","jboss_eap_8_1_for_rhel 9","jboss_enterprise_application_platform 8.1.7.GA"],"slug":"CVE-2026-28367","body":"## Overview\n\nA flaw was found in Undertow. A remote attacker can exploit this vulnerability by sending `\\r\\r\\r` as a header block terminator. This can be used for request smuggling with certain proxy servers, such as older versions of Apache Traffic Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests.\n\n## Affected\n\n- `build_of_apache_camel_-_hawtio = 4.0`\n- `build_of_apache_camel_for_spring_boot = 4.0`\n- `data_grid = 8.0`\n- `fuse = 7.0.0`\n- `jboss_enterprise_application_platform = 7.0.0`\n- `jboss_enterprise_application_platform = 8.0.0`\n- `jboss_enterprise_application_platform_expansion_pack`\n- `process_automation = 7.0`\n- `single_sign-on = 7.0`\n- `undertow`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:25125** · Red Hat · fixed in: Red Hat JBoss EAP 8.1 for RHEL 8, Red Hat JBoss EAP 8.1 for RHEL 9 · released 2026-06-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:25125)\n- **RHSA-2026:25126** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 8.1.7.GA · released 2026-06-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:25126)\n- **Red Hat VEX** · Important · affected: Red Hat build of Apache Camel for Spring Boot 4, Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, … · no fix planned: Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat Process Automation 7, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28367.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}