# CVE-2024-27307

## Summary

- **CVE ID:** CVE-2024-27307
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-1321
- **Published:** Mar 6, 2024
- **Last Modified:** Mar 13, 2026

## Description

JSONata is a JSON query and transformation language. Starting in version 1.4.0 and prior to version 1.8.7 and 2.0.4, a malicious expression can use the transform operator to override properties on the `Object` constructor and prototype. This may lead to denial of service, remote code execution or other unexpected behavior in applications that evaluate user-provided JSONata expressions. This issue has been fixed in JSONata versions 1.8.7 and 2.0.4. Applications that evaluate user-provided expressions should update ASAP to prevent exploitation. As a workaround, one may apply the patch manually.

## Affected Products

- jsonata-js — jsonata (>= 1.4.0, < 1.8.7)
- jsonata-js — jsonata (>= 2.0.0, < 2.0.4)

## References

- [CNA](https://github.com/jsonata-js/jsonata/security/advisories/GHSA-fqg8-vfv7-8fj8)
- [CNA](https://github.com/jsonata-js/jsonata/commit/1d579dbe99c19fbe509f5ba2c6db7959b0d456d1)
- [CNA](https://github.com/jsonata-js/jsonata/commit/335d38f6278e96c908b24183f1c9c90afc8ae00c)
- [CNA](https://github.com/jsonata-js/jsonata/commit/c907b5e517bb718015fcbd993d742ba6202f2be2)
- [CNA](https://github.com/jsonata-js/jsonata/releases/tag/v2.0.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.42%
- **EPSS Percentile:** 71.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._