High severityJavaInsecure DeserializationHIGH confidence
Xmldecoder Readobject
java.beans.XMLDecoder executes the XML it parses as method calls and can instantiate arbitrary objects, giving remote code execution on untrusted input (CWE-502).
Standards mapping
- OWASP Top 10
- A08:2021 - Software and Data Integrity Failures
- OWASP ASVS
- V5.5.3 (L1)
Vulnerable vs. safe
Flagged by this check
XMLDecoder dec = new XMLDecoder(in);Passes - the safe pattern
Object good = u.unmarshal(reader);Why it matters & how to fix it
java.beans.XMLDecoder executes the XML it parses as method calls and can instantiate arbitrary objects, giving remote code execution on untrusted input (CWE-502). Never use XMLDecoder to parse data from an untrusted source. Use a safe data binder (Jackson/JAXB) restricted to expected types instead.
References
Rule ID integsec-java-xmldecoder-readobject - engine: Opengrep - license: MIT - Copyright (c) IntegSec Inc.
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