CVE-2026-12208: medium-severity vulnerability in jsonata-js jsonata
jsonata-js jsonata Function Binding Frame System jsonata.js createFrame prototype pollution
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.9epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Affected products
jsonata-js · jsonatapublic PoCs found — 1
cve_referencegithub.com/OriginSecurityX/jsonata-hasownproperty-bypassunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — jsonata-js jsonata
In the same product, most dangerous first.
CVE-2024-27307CRITICALJSONata expression can pollute the "Object" prototypeEPSS 1.4%CVE-2026-77415CRITICALJSONata: Arbitrary Code Execution via crafted JSONata expressionsEPSS 0.9%CVE-2026-77413CRITICALJSONata: Arbitrary Code Execution via crafted JSONata expressionsEPSS 0.7%CVE-2026-52746HIGHJSONata: Malicious inputs to "$toMillis" function can cause resource exhaustionEPSS 0.7%CVE-2026-77414CRITICALJSONata: Arbitrary Code Execution via crafted JSONata expressionsEPSS 0.6%