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PatchSiren cyber security CVE debrief

CVE-2026-12208 jsonata-js CVE debrief

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.

Vendor
jsonata-js
Product
jsonata
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of jsonata-js jsonata up to 2.2.0 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by a weakness in the createFrame function of the src/jsonata.js file in the Function Binding Frame System component of jsonata-js jsonata up to 2.2.0. This weakness allows for improperly controlled modification of object prototype attributes.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to a version of jsonata-js jsonata that is not vulnerable.

Evidence notes

The CVE record was obtained from the official CVE website [cve-org]. Additional information was obtained from the National Vulnerability Database [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12208 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12208

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12208 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12208

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.