CodeQL library for Java/Kotlin
codeql/java-all 7.1.3-dev (changelog, source)
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Predicate TaintTracking::LocalTaintFlow::hasFlow

Holds if taint can flow from n1 to n2 in zero or more local (intra-procedural) steps that are restricted to be part of a path between source and sink.

Import path

import semmle.code.java.dataflow.TaintTracking
predicate hasFlow(Node n1, Node n2)