CVE-2025-12758 - CVE House
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Status published High CVE-2025-12758

Versions of the package validator before 13.15.22 are vulnerable to...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Karol Wrótniak

References

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Affected Vendor

Affected Software

validator, org.webjars.npm:validator
Vulnerable Versions:
0

Timeline

Official Publish: November 27th, 2025
Last Modified: July 14th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-792

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.