{"id":"CVE-2026-93566","title":"A flaw was found in Netty","summary":"A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker …","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-1035"],"vendor":"Red Hat","product":"netty-codec-http","affected":["netty-codec-http","netty-codec-http","netty-codec-http","netty-codec-http (all versions)","netty-codec-http (all versions)","netty-codec-http (all versions)","netty-codec-http (all versions)","netty-codec-http (all versions)","netty-codec-http (all versions)","netty-codec-http (all versions)","netty-codec-http","netty-codec-http","netty-codec-http (all versions)","netty-codec-http"],"patched":["build_of_quarkus 3.27.5.SP2","build_of_quarkus 3.33.3.SP2"],"published":"2026-09-18","updated":"2026-10-15","sourceUpdated":"2026-10-15T17:17:31.093","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93566","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69440","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:69470","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:83612","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93566","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536954","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93566.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93566"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93566"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-22T14:28:28.241291Z"},"epss":0.00479,"epssPercentile":0.41149,"ingestedAt":"2026-09-18T14:43:13.070Z","slug":"CVE-2026-93566","body":"## Overview\n\nA flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can lead to HTTP request smuggling, potentially resulting in information disclosure or other unauthorized actions.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat AMQ Broker 7, Red Hat AMQ Clients, Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Apicurio Registry 3, Red Hat build of Debezium 3, … · no fix planned: Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat Single Sign-On 7, Red Hat AMQ Broker 7, … · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93566.json)\n- **RHSA-2026:69470** · Red Hat · fixed in: Red Hat build of Quarkus 3.27.5.SP2 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69470)\n- **RHSA-2026:69440** · Red Hat · fixed in: Red Hat build of Quarkus 3.33.3.SP2 · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69440)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}