CVE-2026-103387: Garycourt Uri-Js

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A weakness has been identified in garycourt uri-js up to 4.4.1. This affects the function URI.parse of the file src/schemes/mailto.ts of the component Mailto Header Handler. This manipulation of the argument to causes uncaught exception. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

• Garycourt Uri-Js: version 4.4.0 only; version 4.4.1 only

Published 2026-09-30. Last modified 2026-10-01.