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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-12758 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  Snyk
CVSS-BT 7.7 HIGH
Vector:  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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://seclists.org/fulldisclosure/2026/Jan/27 CVE
https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e Snyk Exploit  Third Party Advisory 
https://github.com/validatorjs/validator.js/pull/2616 Snyk Issue Tracking  Patch 
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-14152011 Snyk
https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476 CISA-ADP, Snyk Exploit  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-172 Encoding Error CISA-ADP  
CWE-792 Incomplete Filtering of One or More Instances of Special Elements Snyk  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-12758
NVD Published Date:
11/27/2025
NVD Last Modified:
07/14/2026
Source:
Snyk