CVE-2025-57351

Description

A prototype pollution vulnerability exists in the ts-fns package versions prior to 13.0.7, where insufficient validation of user-provided keys in the assign function allows attackers to manipulate the Object.prototype chain. By leveraging this flaw, adversaries may inject arbitrary properties into the global object's prototype, potentially leading to application crashes, unexpected code execution behaviors, or bypasses of security-critical validation logic dependent on prototype integrity. The vulnerability stems from improper handling of deep property assignment operations within the library's public API functions. This issue remains unaddressed in the latest available version.

How to fix CVE-2025-57351

No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.

• —no fix listed

Is CVE-2025-57351 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, <= 13.1.3

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-57351
• PATCHgithub.com/tangshuang/ts-fns
• WEBgithub.com/tangshuang/ts-fns/issues/36
• WEBgithub.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57351