CVE-2026-77413
Published:August 21, 2026
Updated:September 24, 2026
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.
Affected Packages
https://github.com/jsonata-js/jsonata.git (GITHUB):
Affected version(s) >=v2.0.0 <v2.2.0Fix Suggestion:
Update to version v2.2.0https://github.com/jsonata-js/jsonata.git (GITHUB):
Affected version(s) >=v1.0 <v1.8.8Fix Suggestion:
Update to version v1.8.8jsonata (NPM):
Affected version(s) >=2.0.0 <2.2.0Fix Suggestion:
Update to version 2.2.0jsonata (NPM):
Affected version(s) >=1.0.0 <1.8.8Fix Suggestion:
Update to version 1.8.8Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Control of Generation of Code ('Code Injection')
EPSS
Base Score:
0.52