RCE in Jsonata-Js Jsonata
CVE-2026-12208
A weakness has been identified in jsonata-js jsonata up to 2.2.0. The affected element is the function createFrame of the file src/jsonata.js of the component Function Binding Frame System. This manipulation causes improperly controlled modification of object prototype attributes. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Jsonata-js Jsonata — versions 2.0, 2.1, 2.2.0
Weakness classification (CWE)
References
- cna@vuldb.com (exploit)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-12208?
- CVE-2026-12208 is a medium-severity vulnerability in Jsonata-Js Jsonata, classified under Code Injection. CVSS score: 5.3/10. Published 2026-06-15.
- How severe is CVE-2026-12208?
- Medium severity. CVSS v3 base score is 5.3 out of 10.