{"id":"CVE-2026-93579","title":"A flaw was found in Netty's HTTP/2 stack","summary":"A flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When thes…","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-http2","affected":["netty-codec-http2 (all versions)","netty-codec-http2 (all versions)","netty-codec-http2 (all versions)","netty-codec-http2 (all versions)","netty-codec-http2 (all versions)","netty-codec-http2","netty-codec-http2 (all versions)","netty-codec-http2","netty-codec-http2","netty-codec-http2","netty-codec-http2 (all versions)","netty-codec-http2"],"published":"2026-09-18","updated":"2026-09-21","sourceUpdated":"2026-09-21T18:17:16.913","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93579","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69470","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93579","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536970","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93579.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93579"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93579"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00231,"epssPercentile":0.14185,"ingestedAt":"2026-09-18T16:45:41.406Z","slug":"CVE-2026-93579","body":"## Overview\n\nA flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When these values cross an HTTP/2 to HTTP/1.1 translation boundary, they can be exploited for request smuggling, header injection, or response splitting. This could lead to unauthorized access, data manipulation, or other security bypasses.\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 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, Red Hat Build of Keycloak, … · no fix planned: Red Hat Build of Keycloak, Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, … · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93579.json)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}