Vulnerabilities in pkg:npm/validator

PACKAGE
Advisory Identifier: GHSA-vghf-hv5q-vc2g
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Advisory Summary

CVE-2025-12758 is a HIGH (CVSS 7.5) validator is vulnerable to incomplete vulnerability (CWE-792: Incomplete Filtering of One or More Instances of Special Elements) affecting Validator libraries in the npm ecosystem. The issue involves validator is vulnerable to incomplete filtering of one or more instances of special elements. Remediation is available by upgrading affected packages to version 13.15.22.

11 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/validator

11 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-vghf-hv5q-vc2g CVE-2025-12758 HIGH Validator is Vulnerable to Incomplete Filtering of One or More Instances of Special Elements
GHSA-9965-vmph-33xx CVE-2025-56200 MODERATE validator.js has a URL validation bypass vulnerability in its isURL function
GHSA-xx4c-jj58-r7x6 - MODERATE Inefficient Regular Expression Complexity in Validator.js
GHSA-qgmg-gppg-76g5 CVE-2021-3765 MODERATE Inefficient Regular Expression Complexity in validator.js
GHSA-f5w6-r7rg-mcgq CVE-2014-8882 HIGH Regular Expression Denial of Service in validator
GHSA-rh6c-q938-3r9q CVE-2013-7452 MODERATE Moderate severity vulnerability that affects validator
GHSA-qpjp-7rp2-9c3f CVE-2013-7451 MODERATE Moderate severity vulnerability that affects validator
GHSA-q4qq-fm7q-cwp5 CVE-2013-7454 MODERATE Multiple XSS Filter Bypasses in validator
GHSA-79mx-88w7-8f7q CVE-2014-9772 MODERATE XSS Filter Bypass via Encoded URL in validator
GHSA-552w-rqg8-gxxm CVE-2013-7453 MODERATE Moderate severity vulnerability that affects validator
GHSA-9959-c6q6-6qp3 - MODERATE Moderate severity vulnerability that affects validator

CVE-2025-12758 at a Glance

CVE Identifier CVE-2025-12758
GHSA Identifier GHSA-vghf-hv5q-vc2g
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-792: Incomplete Filtering of One or More Instances of Special Elements
Affected Product Validator
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-12758

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

validator fixed: 13.15.22 
npm install validator@13.15.22
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 validator

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2025-12758, inspect your project dependencies using npm:

npm ls validator

Analyze the terminal output to locate any version of Validator in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 13.15.22), your application is affected.

Note: The npm ls validator 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-792: Incomplete Filtering of One or More Instances of Special Elements, where the product receives data from an upstream component, but does not completely filter one or more instances of special elements before sending it to a downstream component. In Validator, 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

Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\uFE0F, \uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.

CVE-2025-12758 Affected Validator Versions

1 component(s)
Fixed Versions:
13.15.22
Product / Package Ecosystem Affected Versions Fixed Version
validator
npm/validator
npm
< 13.15.22
13.15.22

References

NVD — CVE-2025-12758 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-12758
Validator Source Repository REPOSITORY
https://github.com/validatorjs/validator.js/pull/2616
Security Fix Commit FIX COMMIT
https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382
Validator Source Repository REPOSITORY
https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
Validator Source Repository REPOSITORY
https://github.com/validatorjs/validator.js
Validator Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
seclists.org/fulldisclosure/2026... WEB
http://seclists.org/fulldisclosure/2026/Jan/27

Frequently Asked Questions

What is CVE-2025-12758?
CVE-2025-12758 is a security vulnerability in Validator involving Validator is Vulnerable to Incomplete Filtering of One or More Instances of Special Elements under CWE-792: Incomplete Filtering of One or More Instances of Special Elements.
Which Validator versions are affected?
Affected versions include releases prior to 13.15.22 across affected packages: validator.
What version fixes CVE-2025-12758?
Upgrading to 13.15.22 (or the latest patched release for your respective branch) resolves the vulnerability.
Is validator affected?
Yes, validator is affected in releases prior to 13.15.22. Upgrade your dependency to 13.15.22 or later.
What is the CVSS score of CVE-2025-12758?
CVE-2025-12758 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-12758?
CVE-2025-12758 is classified under CWE-792: Incomplete Filtering of One or More Instances of Special Elements (The product receives data from an upstream component, but does not completely filter one or more instances of special elements before sending it to a downstream component.).
How can I check npm dependencies for CVE-2025-12758?
Run the dependency tree command: 'npm ls validator'. 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-vghf-hv5q-vc2g",
  "modified" : "2026-01-31T03:33:13Z",
  "published" : "2025-11-27T06:31:25Z",
  "aliases" : [ "CVE-2025-12758" ],
  "summary" : "Validator is Vulnerable to Incomplete Filtering of One or More Instances of Special Elements",
  "details" : "Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\\uFE0F, \\uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "validator"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "13.15.22"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-12758"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/validatorjs/validator.js/pull/2616"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/validatorjs/validator.js"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476"
  }, {
    "type" : "WEB",
    "url" : "http://seclists.org/fulldisclosure/2026/Jan/27"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-172", "CWE-792" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-12-02T16:51:42Z",
    "nvd_published_at" : "2025-11-27T05:16:12Z"
  }
}