CVE-2026-12208Public exploitNetwork attack vector

Remote code execution via binding-frame prototype pollution

Published Jun 15, 2026 · Updated Jun 15, 2026

Prototype pollution in JSONata 2.0 through 2.2.0 allows remote attackers to execute code through crafted expressions and bindings. createFrame stores bindings in a plain object, bind writes attacker-chosen names directly, and lookup calls the shadowable bindings.hasOwnProperty method. Exploitation requires a host application to evaluate attacker-controlled JSONata expressions with influenced bindings; a successful chain replaces built-ins and executes code in that process.

CVSS severity5.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in JSONata 2.0 through 2.2.0 allows remote attackers to execute code through crafted expressions and bindings. createFrame stores bindings in a plain object, bind writes attacker-chosen names directly, and lookup calls the shadowable bindings.hasOwnProperty method. Exploitation requires a host application to evaluate attacker-controlled JSONata expressions with influenced bindings; a successful chain replaces built-ins and executes code in that process.

The record

CVE
CVE-2026-12208
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
JSONata
Product
JSONata
Classifications
CWE-94, CWE-1321, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0
  2. Affected versionversion=2.1
  3. Affected versionversion=2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JSONata · JSONataversion=2.0; version=2.1; version=2.2.0

Published CVSS scores

5.5VulDBCVSS: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
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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