Vulnerabilities in pkg:npm/ts-fns

PACKAGE
Advisory Identifier: GHSA-g7wq-wggw-vmhg
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Advisory Summary

CVE-2025-57351 is a MODERATE ts-fns has prototype pollution vulnerability vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Ts fns libraries in the npm ecosystem. The issue involves ts-fns has prototype pollution vulnerability. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/ts-fns

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/ts-fns. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-g7wq-wggw-vmhg CVE-2025-57351 MODERATE ts-fns has prototype pollution vulnerability

CVE-2025-57351 at a Glance

CVE Identifier CVE-2025-57351
GHSA Identifier GHSA-g7wq-wggw-vmhg
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Ts fns
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2025-57351

To remediate this vulnerability, upgrade all affected Ts fns dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ts-fns fixed: Latest secure release 
npm install ts-fns@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls ts-fns

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2025-57351, inspect your project dependencies using npm:

npm ls ts-fns

Analyze the terminal output to locate any version of Ts fns in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls ts-fns command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where 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. In Ts fns, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2025-57351 Affected Ts fns Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
ts-fns
npm/ts-fns
npm
≤ 13.1.3

References

NVD — CVE-2025-57351 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-57351
Ts fns Source Repository REPOSITORY
https://github.com/tangshuang/ts-fns/issues/36
Ts fns Source Repository REPOSITORY
https://github.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57351
Ts fns Source Repository REPOSITORY
https://github.com/tangshuang/ts-fns

Frequently Asked Questions

What is CVE-2025-57351?
CVE-2025-57351 is a security vulnerability in Ts fns involving ts-fns has prototype pollution vulnerability under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Ts fns versions are affected?
Affected versions include releases prior to current release patches across affected packages: ts-fns.
What version fixes CVE-2025-57351?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is ts-fns affected?
Yes, ts-fns is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2025-57351?
CVE-2025-57351 is classified under 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.).
How can I check npm dependencies for CVE-2025-57351?
Run the dependency tree command: 'npm ls ts-fns'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-g7wq-wggw-vmhg",
  "modified" : "2025-09-25T17:32:34Z",
  "published" : "2025-09-24T21:30:37Z",
  "aliases" : [ "CVE-2025-57351" ],
  "summary" : "ts-fns has prototype pollution vulnerability",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "ts-fns"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "13.1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-57351"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/tangshuang/ts-fns/issues/36"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/VulnSageAgent/PoCs/tree/main/JavaScript/prototype-pollution/CVE-2025-57351"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/tangshuang/ts-fns"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-09-25T17:32:34Z",
    "nvd_published_at" : "2025-09-24T19:15:40Z"
  }
}