Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, any caller that can deliver bytes to a Netty channel pipeline containing `XmlDecoder` can send XML with a `DOCTYPE` declaration to an `AsyncXMLInputFactory` instantiated with no security configuration, leaving DTD and entity handling active depending on Aalto XML async parser behavior and creating conditional XML external entity risk. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-56817 XML External Entity Vulnerability in Netty XmlDecoder 4.1.0 Through 4.2.15 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-56817
Post summary
The entry points out CVE‑2026‑56817 as an XML External Entity flaw in Netty XmlDecoder 4.1.0–4.2.15 but provides no further technical depth, PoC, exploitation, patch, or mitigation details.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | netty | netty | - | - | - |