CVE-2026-46681Public exploitNetwork attack vector

Prototype pollution via unsafe inherited-property copying

Published Jul 21, 2026 · Updated Jul 21, 2026

Prototype pollution in @nevware21/ts-utils before 0.14.0 allows attackers to modify application object prototypes via crafted input. The _copyProps function in lib/src/object/copy.ts copies inherited properties and dangerous keys without an own-property check or key filter. Exploitation requires attacker-controlled data to reach objDeepCopy or objCopyProps, after which polluted properties can affect every object sharing the modified prototype.

CVSS severityUnavailable
Unscored
EPSS probability0.48%
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 @nevware21/ts-utils before 0.14.0 allows attackers to modify application object prototypes via crafted input. The _copyProps function in lib/src/object/copy.ts copies inherited properties and dangerous keys without an own-property check or key filter. Exploitation requires attacker-controlled data to reach objDeepCopy or objCopyProps, after which polluted properties can affect every object sharing the modified prototype.

The record

CVE
CVE-2026-46681
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
NevWare21 Solutions LLC
Product
@nevware21/ts-utils
Classifications
CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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=< 0.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NevWare21 Solutions LLC · @nevware21/ts-utilsversion=< 0.14.0

Published CVSS scores

7.2GitHub Security AdvisoriesCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

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')

Public exploit references

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Technologies

Your stack

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Your stack

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