Prototype Pollution via _.unset/.omit in Lodash 4.17.22
CVE-2025-13465 Published on January 21, 2026
Prototype Pollution Vulnerability in Lodash _.unset and _.omit functions
Lodash versions 4.0.0 through 4.17.22 are vulnerable to prototype pollution in the _.unset and _.omit functions. An attacker can pass crafted paths which cause Lodash to delete methods from global prototypes.
The issue permits deletion of properties but does not allow overwriting their original behavior.
This issue is patched on 4.17.23
Vulnerability Analysis
CVE-2025-13465 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and a high impact on availability.
Weakness Type
What is a Prototype Pollution Vulnerability?
The software 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.
CVE-2025-13465 has been classified to as a Prototype Pollution vulnerability or weakness.
Products Associated with CVE-2025-13465
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Affected Versions
Lodash:- Version 4.0.0, <= 4.17.22 is affected.
- Version 4.0.0, <= 4.17.22 is affected.
- Version 4.0.0, <= 4.17.22 is affected.
- Version 4.0.0 is affected.
- Before V4.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.