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CVE-2026-103387— garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception

Quick assessment

Affected
garycourt uri-js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 garycourt uri-js 4.4.1 及更早版本中发现了一个安全弱点。该问题影响 Mailto Header Handler 组件中 文件的 函数。对该函数的参数进行特定操作会导致未捕获的异常（uncaught exception）。攻击者可远程发起此漏洞利用。该漏洞的利用代码已公开，可能被用于实际攻击。项目方已通过问题报告提前获知该漏洞，但截至目前尚未作出回应。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-103387

Vulnerability Information
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Vulnerability Title
garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
garycourt uri-js 4.4.0 cpe:2.3:a:garycourt:uri-js:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-103387

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103387

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Other References for CVE-2026-103387 (2)

IV. Related Vulnerabilities

Same product: uri-js
Same vendor: garycourt
Same weakness: CWE-248

V. Comments for CVE-2026-103387

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