CVE-2026-54737

HIGH7.3

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

Published Jul 31, 2026

Modified 2 weeks ago

Details

@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.

References

WEB

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

WEB

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

WEB

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

WEB

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

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-54737

CVSS Analysis