AIKIDO-2026-10859
jsonata is vulnerable to Type Confusion
65
Medium Risk
This Affects:
jsonataTL;DR
JSONata identifies internal functions and lambdas with _jsonata_function and _jsonata_lambda marker properties. Expressions can construct objects with those marker names, causing user-created objects to mimic internal evaluator values. This can interfere with expression processing and route crafted objects through function/lambda handling paths. The fix rejects object construction that attempts to set those internal marker properties.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
jsonata is vulnerable to Type Confusion in versions 1.8.7 - 2.2.0.
How to fix this
Upgrade the jsonata library to the patch version.
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