{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28367","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","state":"PUBLISHED","assignerShortName":"redhat","dateReserved":"2026-02-27T04:42:16.439Z","datePublished":"2026-03-27T16:13:05.108Z","dateUpdated":"2026-04-10T14:50:20.986Z"},"containers":{"cna":{"title":"Undertow: undertow: request smuggling via `\\r\\r\\r` as a header block terminator","metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"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"},"format":"CVSS"}],"descriptions":[{"lang":"en","value":"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 Server and Google Cloud Classic Application Load Balancer, potentially leading to unauthorized access or manipulation of web requests."}],"affected":[{"vendor":"Red Hat","product":"Red Hat build of Apache Camel for Spring Boot 4","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"undertow-core","defaultStatus":"affected","cpes":["cpe:/a:redhat:camel_spring_boot:4"]},{"vendor":"Red Hat","product":"Red Hat build of Apache Camel - HawtIO 4","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"undertow-core","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:apache_camel_hawtio:4"]},{"vendor":"Red Hat","product":"Red Hat Data Grid 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Ensure that these proxies are configured to reject or normalize non-standard header block terminators, such as `\\r\\r\\r`, before forwarding requests to Undertow. This operational control helps prevent request smuggling attacks by ensuring that only properly formed HTTP requests reach the Undertow server."}],"timeline":[{"lang":"en","time":"2026-02-27T00:00:00.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2025-08-27T00:00:00.000Z","value":"Made public."}],"providerMetadata":{"orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat","dateUpdated":"2026-04-10T14:50:20.986Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-31T13:27:40.351547Z","id":"CVE-2026-28367","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-31T13:27:54.878Z"}}]}}