CVE-2017-20227: Varaneckas Jad Java Decompiler

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

JAD Java Decompiler 1.5.8e-1kali1 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying overly long input that exceeds buffer boundaries. Attackers can craft malicious input passed to the jad command to overflow the stack and execute a return-oriented programming chain that spawns a shell.

Affected products

• Varaneckas Jad Java Decompiler: version 1.5.8e-1kali1 only

Published 2026-03-28. Last modified 2026-06-17.