Vulnerability library
Security checkAugust 21, 2026

JSONata: Arbitrary Code Execution via crafted JSONata expressions

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High severitynpmjsonata

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Description

Before JSONata 2.2.0 and 1.8.8 it was possible to execute arbitrary code with crafted expressions, due to a missing hasOwnProperty check in the lookup function: https://github.com/jsonata-js/jsonata/blob/f9632e01e6e67d4f9f00593f9795420cb4b57f48/src/functions.js#L1686-L1705

This was fixed with https://github.

Recommendation

Update the jsonata package to the latest compatible version. Followings are version details:

  • Affected version(s): **>= 2.0.0, < 2.2.0 <= 1.8.7**
  • Patched version(s): **2.2.0 1.8.8**

References

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See something that needs correcting? Let us knowUpdated August 21, 2026