CVE-2026-54737

Published: Jul 31, 2026Modified: Sep 10, 2026Deferred

7.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Exploitability: 3.9 / Impact: 3.4

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

References (4)

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

Source: security-advisories@github.com

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

Source: security-advisories@github.com

https://github.com/phun-ky/defaults-deep/releases/tag/2.0.5

Source: security-advisories@github.com

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

Source: security-advisories@github.com

Timeline

No history available yet.