Code Injection in JSONata - #VU138341
Published: July 17, 2026
Vulnerability identifier: #VU138341
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: andrew-coleman
Affected software:
JSONata
JSONata
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper control over dynamically managed code resources in expression evaluation logic when processing crafted JSONata expressions. A remote attacker can supply a specially crafted expression to execute arbitrary code.
The issue can be triggered by chaining multiple expression-manipulation behaviors, including overwriting $clone, destructuring functions or lambdas, and abusing proc.arguments.forEach in applyProcedure.
Remediation
Install security update from vendor's website.