Unchecked Input for Loop Condition Affecting io.netty:netty-codec-xml package, versions [,4.1.136.Final)[4.2.0.Alpha1,4.2.16.Final)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published16 Aug 2026
- disclosed13 Aug 2026
- creditvioletagg
Introduced: 13 Aug 2026
NewCVE-2026-73507 (opens in a new tab)How to fix?
Upgrade io.netty:netty-codec-xml to version 4.1.136.Final, 4.2.16.Final or higher.
Overview
Affected versions of this package are vulnerable to Unchecked Input for Loop Condition via CPU exhaustion through the XML framing logic in codec-xml/src/main/java/io/netty/handler/codec/xml/XmlFrameDecoder.java. An attacker can monopolize the server's EventLoop thread by sending a trickle of malformed XML data, such as repeated </ sequences, that forces the decoder to rescan the accumulated buffer repeatedly. This can make any application using XmlFrameDecoder become unresponsive and unable to process other traffic on the affected connection or event loop.