Null Byte Interaction Error (Poison Null Byte) Affecting io.netty:netty-codec-socks package, versions [,4.1.137.Final)[4.2.0.Final,4.2.17.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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Test your applications- Snyk IDSNYK-JAVA-IONETTY-19233598
- published24 Aug 2026
- disclosed22 Aug 2026
Introduced: 22 Aug 2026
NewCVE-2026-62380 (opens in a new tab)How to fix?
Upgrade io.netty:netty-codec-socks to version 4.1.137.Final, 4.2.17.Final or higher.
Overview
Affected versions of this package are vulnerable to Null Byte Interaction Error (Poison Null Byte) via the Socks4ClientEncoder and Socks5ClientEncoder in codec-socks. An attacker can truncate or alter encoded SOCKS requests by supplying userId, destination host, username, or password values containing embedded NUL bytes. This can make the proxy interpret different credentials or destination names than the application intended, leading to domain spoofing, authentication confusion, and proxy connections being sent to the wrong host.