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GHSA-663r-x48j-fg8p

jsonata: Function Binding Prototype Pollution via hasOwnProperty Override

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-12208

Packages

EcosystemPackageAffectedFixed in
npm jsonata < 1.8.8 1.8.8
npm jsonata >= 2.0.0, < 2.2.1 2.2.1

Details

As written in the advisory (Markdown source, shown as plain text).

A weakness has been identified in jsonata-js jsonata up to 2.2.0. The affected element is the function createFrame of the file src/jsonata.js of the component Function Binding Frame System. This manipulation causes improperly controlled modification of object prototype attributes. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

References

External links from the advisory. They lead to third-party sites.