CVE-2025-12758

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e
https://github.com/validatorjs/validator.js/pull/2616
https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476
https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476

Configurations

No configuration.

History

03 Dec 2025, 17:15

Type	Values Removed	Values Added
References	~~() https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476 -~~	() https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476 -
CWE		CWE-172

27 Nov 2025, 05:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-11-27 05:16

Updated : 2025-12-03 17:15

NVD link : CVE-2025-12758

Mitre link : CVE-2025-12758

CVE.ORG link : CVE-2025-12758

JSON object : View

Products Affected

No product.

CWE

CWE-792

Incomplete Filtering of One or More Instances of Special Elements

CWE-172

Encoding Error

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