CVE-2024-27307: Jsonata

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

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 Jsonata: from 1.4.0, before 1.8.7 (fixed in 1.8.7); from 2.0.0, before 2.0.4 (fixed in 2.0.4)

Published 2024-03-06. Last modified 2026-06-17.