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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."},{"lang":"es","value":"Se encontró un fallo en Undertow. Esta vulnerabilidad permite a un atacante remoto construir solicitudes especialmente diseñadas donde los nombres de las cabeceras son analizados de manera diferente por Undertow en comparación con los proxies ascendentes. Esta discrepancia en la interpretación de las cabeceras puede ser explotada para lanzar ataques de contrabando de solicitudes, potencialmente eludiendo los controles de seguridad y accediendo a recursos no autorizados."}],"id":"CVE-2026-28368","lastModified":"2026-11-04T23:17:26.687","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"exploitabilityScore":2.2,"impactScore":5.8,"source":"secalert@redhat.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"exploitabilityScore":3.9,"impactScore":5.2,"source":"nvd@nist.gov","type":"Primary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-28368","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","timestamp":"2026-03-27T18:49:45.702271Z","version":"2.0.3"}}]},"published":"2026-03-27T17:16:27.993","references":[{"source":"secalert@redhat.com","url":"https://access.redhat.com/errata/RHSA-2026:25125"},{"source":"secalert@redhat.com","url":"https://access.redhat.com/errata/RHSA-2026:25126"},{"source":"secalert@redhat.com","tags":["Vendor Advisory"],"url":"https://access.redhat.com/security/cve/CVE-2026-28368"},{"source":"secalert@redhat.com","tags":["Issue Tracking","Vendor Advisory"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2443261"}],"sourceIdentifier":"secalert@redhat.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-444"}],"source":"secalert@redhat.com","type":"Secondary"}]},"severity":"HIGH","source":"nvd","title":"A flaw was found in Undertow"}