CVE-2025-57330Public exploitNetwork attack vector

Service interruption via Object.prototype property injection

Published Sep 24, 2025 · Updated Sep 24, 2025

Prototype pollution in web3-core-subscriptions 1.10.4 and earlier allows remote attackers to interrupt applications via crafted subscription data. The attachToObject function follows a constructor-supplied name such as proto.polluted as a property path and writes through it, modifying Object.prototype. Reachability requires a consuming application to pass attacker-controlled subscription constructor data; successful pollution can crash or destabilize that application.

CVSS severity7.5
High
EPSS probability0.39%
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 web3-core-subscriptions 1.10.4 and earlier allows remote attackers to interrupt applications via crafted subscription data. The attachToObject function follows a constructor-supplied name such as proto.polluted as a property path and writes through it, modifying Object.prototype. Reachability requires a consuming application to pass attacker-controlled subscription constructor data; successful pollution can crash or destabilize that application.

The record

CVE
CVE-2025-57330
Published
Sep 24, 2025
Updated
Sep 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1321, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2025Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.9GitHubCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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 exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1499Endpoint Denial of Service

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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