CVE-2026-77413

JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.0, the src/functions.js lookup function lacked an Object.prototype.hasOwnProperty check and allowed crafted expressions to access inherited prototype members. An attacker able to supply an expression could use inherited prototype setters and getters, constructor access, valueOf, and process.getBuiltinModule to reach the child_process module and execute arbitrary code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.0.

• CWE-94

• https://github.com/jsonata-js/jsonata/commit/4b217d514376e30cba278941298d7ba97c4a6c6e
• https://github.com/jsonata-js/jsonata/commit/4c5f4adfb90a9b500889d50f90050ca68888b50d
• https://github.com/jsonata-js/jsonata/pull/794
• https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8
• https://github.com/jsonata-js/jsonata/releases/tag/v2.2.0
• https://github.com/jsonata-js/jsonata/security/advisories/GHSA-8gq3-vp5j-2grp
• https://github.com/jsonata-js/jsonata/security/advisories/GHSA-8gq3-vp5j-2grp

Published

Aug 21, 2026

Last Modified

Oct 12, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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