{"cve":"CVE-2026-28368","nvd":{"published":"2026-03-27T17:16:27.993","modified":"2026-10-14T17:18:27.340","status":"Modified","description":"A flaw was found in Undertow. This vulnerability allows a remote attacker to construct specially crafted requests where header names are parsed differently by Undertow compared to upstream proxies. This discrepancy in header interpretation can be exploited to launch request smuggling attacks, potentially bypassing security controls and accessing unauthorized resources.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-444"],"references":["https://access.redhat.com/errata/RHSA-2026:25125","https://access.redhat.com/errata/RHSA-2026:25126","https://access.redhat.com/security/cve/CVE-2026-28368","https://bugzilla.redhat.com/show_bug.cgi?id=2443261"],"products":["redhat:build_of_apache_camel_-_hawtio","redhat:build_of_apache_camel_for_spring_boot","redhat:data_grid","redhat:enterprise_linux","redhat:fuse","redhat:jboss_enterprise_application_platform","redhat:jboss_enterprise_application_platform_expansion_pack","redhat:process_automation","redhat:single_sign-on","redhat:undertow"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-28368","score":0.00732,"percentile":0.54021,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-8v4x-mgvp-p658","url":"https://osv.dev/vulnerability/GHSA-8v4x-mgvp-p658","summary":"Undertow is Vulnerable to HTTP Request/Response Smuggling","modified":"2026-09-10T03:50:38.339564288Z","packages":[{"ecosystem":"Maven","name":"io.undertow:undertow-parent","purl":"pkg:maven/io.undertow/undertow-parent","ranges":["<=2.3.23.Final"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}