Improper Verification of Source of a Communication Channel Affecting io.netty:netty-codec-classes-quic package, versions [4.2.0.Final,4.2.15.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-17265116
- published9 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
NewCVE-2026-44894 (opens in a new tab)How to fix?
Upgrade io.netty:netty-codec-classes-quic to version 4.2.15.Final or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Source of a Communication Channel due to improper validation in the validateToken function. An attacker can cause the server to treat unvalidated client addresses as validated by supplying any non-empty token bytes in an Initial packet with a spoofed source IP, resulting in the server reflecting large handshake responses to the victim without the intended anti-amplification limit.