CVE-2022-4742Network attack vector

Prototype pollution via array pointer tokens

Published Dec 26, 2022 · Updated Aug 3, 2024

Prototype pollution in json-pointer 0.6.0 and 0.6.1 allows remote attackers to alter object prototypes via crafted pointer tokens. The index.js set function accepts array-valued pointer components, converts them into property names, and can reach proto, constructor, or prototype assignments without adequate filtering. Exploitation requires an application to pass attacker-controlled pointer data to set; resulting prototype changes can affect confidentiality, integrity, and availability of that Node.js process.

CVSS severity9.8
Critical
EPSS probability1.01%
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 json-pointer 0.6.0 and 0.6.1 allows remote attackers to alter object prototypes via crafted pointer tokens. The index.js set function accepts array-valued pointer components, converts them into property names, and can reach proto, constructor, or prototype assignments without adequate filtering. Exploitation requires an application to pass attacker-controlled pointer data to set; resulting prototype changes can affect confidentiality, integrity, and availability of that Node.js process.

The record

CVE
CVE-2022-4742
Published
Dec 26, 2022
Updated
Aug 3, 2024
Vendor
Manuel Stofer
Product
json-pointer
Classifications
CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=0.6.0
  2. Affected versionversion=0.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Manuel Stofer · json-pointerversion=0.6.0; version=0.6.1

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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