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High severity7.5NVD Advisory· Published Nov 27, 2025· Updated Jul 14, 2026

CVE-2025-12758

CVE-2025-12758

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
validatornpm
< 13.15.2213.15.22

Affected products

11

Patches

Vulnerability mechanics

References

8

News mentions

0

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