CVE-2026-103387: garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception
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 Software
Event History
Frequently Asked Questions
Which versions should be treated as affected?
The affected range is uri-js versions up to and including 4.4.1. The provided information does not identify a fixed release.
What does an attacker need to exploit this issue?
The issue may be initiated remotely and does not require privileges. The supplied vector indicates user interaction is required.
Is public exploit material available?
Yes. The report states that an exploit has been made publicly available and could be used in attacks.