What’s Vulnerable › Vulnerabilities

CVE-2026-12208: jsonata-js jsonata Function Binding Frame System jsonata.js createFrame prototype pollution

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-15 · updated 2026-07-24
• Weakness: CWE-94

Description

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.

Affected products

• jsonata-js jsonata: 2.0, 2.1, 2.2.0

References

• https://github.com/OriginSecurityX/jsonata-hasownproperty-bypass
• https://vuldb.com/cve/CVE-2026-12208
• https://vuldb.com/submit/832446
• https://vuldb.com/vuln/370850
• https://vuldb.com/vuln/370850/cti

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