CVE-2022-37258Network attack vector

Prototype pollution via unchecked deferred-conversion keys

Published Sep 16, 2022 · Updated Aug 3, 2024

Prototype pollution in Steal 2.2.4 allows remote attackers to modify Object.prototype through a crafted npm package name. The convertLater function indexes context.deferredConversions with packageName without rejecting prototype keys, then assigns requestedVersion beneath the resolved object. Reachability depends on an application passing attacker-controlled package metadata into Steal's progressive npm conversion path; polluted properties can alter JavaScript object behavior in that process.

CVSS severity9.8
Critical
EPSS probability1.54%
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 Steal 2.2.4 allows remote attackers to modify Object.prototype through a crafted npm package name. The convertLater function indexes context.deferredConversions with packageName without rejecting prototype keys, then assigns requestedVersion beneath the resolved object. Reachability depends on an application passing attacker-controlled package metadata into Steal's progressive npm conversion path; polluted properties can alter JavaScript object behavior in that process.

The record

CVE
CVE-2022-37258
Published
Sep 16, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1321, CAPEC-180, CAPEC-1, CAPEC-77
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
CAPEC-77Manipulating User-Controlled Variables

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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