cvedb.io
CVE-2026-56817
UNKNOWN · CVSS n/a
EPSS exploitation probability: 0%
Published 2026-07-21T23:17:52.127 · Last modified 2026-07-21T23:17:52.127

Summary

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.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.