Red Hat Lightwell has released io.netty:netty-codec-xml 4.1.100.Final-rhlw-00001 with backported fixes for CVE-2026-56817 and CVE-2026-73507.
CVE-2026-56817: Netty: XML External Entity (XXE) injection via unconfigured XML factory when DTD and entity processing are enabled
CVE-2026-73507: Netty: Denial of Service in XmlFrameDecoder via CPU Exhaustion
This patched artifact is a drop-in replacement for io.netty:netty-codec-xml 4.1.100.Final from Maven Central.
{
"backport_base_version": "4.1.100.Final",
"remediated_version": "4.1.100.Final-rhlw-00001",
"repository_url": "https://packages.redhat.com/lightwell/java/remediated/"
}
"https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-f00b5fbbbb907153.json"