CVE-2026-54737

@phun-ky/defaults-deep Has a Prototype Pollution issue via Unsafe Recursive Property Merging

Published: Jul 31, 2026Updated: Sep 10, 2026 Sources: CVE List NVDCWE-1321

7.3HIGH

Description

@phun-ky/defaults-deep is a library like lodash defaultsDeep with array preservation and no lodash dependency. Prior to 2.0.5, defaultsDeep() recursively merges user-supplied objects without filtering proto, constructor, and prototype, allowing properties to be written to Object.prototype. This issue is fixed in version 2.0.5.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:LAvailability

Low

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Weaknesses

CWE-1321

Affected Products

phun-ky

defaults-deep

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Execution

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References

https://github.com/phun-ky/defaults-deep/security/advisories/GHSA-mj3g-7xcc-x4vh

github.com

https://github.com/phun-ky/defaults-deep/pull/49

github.com

https://github.com/phun-ky/defaults-deep/commit/807dba930f8718f9126cad59d949b8fd3539b059

github.com

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