CVE-2026-103387
garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 30, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C | VulDB |
| 3.0 | 4.3 Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C | VulDB |
| 2.0 | 5.0 Medium | AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C | VulDB |
Weaknesses
- CWE-248 Uncaught Exception
Affected Products
| Product | Versions |
|---|---|
uri-jsgarycourt |
|
References
- VDB-412124 | garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exceptionvdb-entrytechnical-description
- VDB-412124 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-103387 | CVE Analysis and Reportthird-party-advisory
- Submit #956810 | garycourt uri-js 4.4.1 Missing Undefined Check on Mailto URI 'to' Header Parserthird-party-advisory
- https://github.com/garycourt/uri-js/issues/103exploitissue-tracking
- https://github.com/garycourt/uri-js/product
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