CVE-2022-35923: v8n Project v8n

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

v8n is a javascript validation library. Versions of v8n prior to 1.5.1 were found to have an inefficient regular expression complexity in the `lowercase()` and `uppercase()` regex which could lead to a denial of service attack. In testing of the `lowercase()` function a payload of 'a' + 'a'.repeat(i) + 'A' with 32 leading characters took 29443 ms to execute. The same issue happens with uppercase(). Users are advised to upgrade. There are no known workarounds for this issue.

Affected products

• v8n Project v8n: before 1.5.1 (fixed in 1.5.1)

Published 2022-08-02. Last modified 2026-06-17.