Improper access control in JSONata - #VU138339
Published: July 17, 2026
Vulnerability identifier: #VU138339
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-284
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 access to object prototype properties in the lookup function when evaluating crafted JSONata expressions. A remote attacker can supply a specially crafted expression to execute arbitrary code.
Remediation
Install security update from vendor's website.