What’s Vulnerable › Vulnerabilities

CVE-2021-3765: Inefficient Regular Expression Complexity in validatorjs/validator.js

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-02 · updated 2026-06-17
• Weakness: CWE-1333

Description

validator.js is vulnerable to Inefficient Regular Expression Complexity

Affected products

• validatorjs/validator.js: before 13.7.0 — fixed in 13.7.0

How to fix

Upgrade to a fixed version: validatorjs/validator.js 13.7.0. Check the vendor advisory for mitigations.

References

• https://github.com/validatorjs/validator.js/commit/496fc8b2a7f5997acaaec33cc44d0b8dba5fb5e1
• https://huntr.dev/bounties/c37e975c-21a3-4c5f-9b57-04d63b28cfc9
• https://github.com/validatorjs/validator.js/commit/496fc8b2a7f5997acaaec33cc44d0b8dba5fb5e1
• https://huntr.dev/bounties/c37e975c-21a3-4c5f-9b57-04d63b28cfc9

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