Library Vulnerability in Defaults Deep by Phun-Ky
CVE-2026-54737

7.3HIGH

Key Information:

Vendor

Phun-ky

Status
Defaults-deep
Vendor
CVE Published:
31 July 2026

What is CVE-2026-54737?

The Defaults Deep library, similar to lodash, is vulnerable to prototype pollution prior to version 2.0.5. This vulnerability allows attackers to merge user-supplied objects into Object.prototype without adequate filtering. This can lead to potential manipulation and exploitation of the target application's behavior. The issue was addressed in version 2.0.5, which includes necessary safeguards to prevent unauthorized writing to Object.prototype, thereby enhancing security against such injection attacks. To protect your applications, it is essential to upgrade to the latest version.

Affected Version(s)

defaults-deep < 2.0.5

References

https://github.com/phun-ky/defaults-deep/security/advisor...
x_refsource_CONFIRM
https://github.com/phun-ky/defaults-deep/pull/49
x_refsource_MISC
https://github.com/phun-ky/defaults-deep/commit/807dba930...
x_refsource_MISC

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.