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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction Required

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction Required

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
garycourt uri-js affected
Version Status Constraints
4.4.0 affected —
4.4.1 affected —

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Project Subscriptions

Vendors Products
Garycourt Subscribe
Uri-js Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/garycourt/uri-js/ cve-icon cve-icon
https://github.com/garycourt/uri-js/issues/103 cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-103387 cve-icon cve-icon
https://vuldb.com/submit/956810 cve-icon cve-icon
https://vuldb.com/vuln/412124 cve-icon cve-icon
https://vuldb.com/vuln/412124/cti cve-icon cve-icon
History

Wed, 30 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 30 Sep 2026 20:00:00 +0000

Type Values Removed Values Added
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.
Title garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception
First Time appeared Garycourt
Garycourt uri-js
Weaknesses CWE-248
CPEs cpe:2.3:a:garycourt:uri-js:*:*:*:*:*:*:*:*
Vendors & Products Garycourt
Garycourt uri-js
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C'}

cvssV3_0

{'score': 4.3, 'vector': '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'}

cvssV3_1

{'score': 4.3, 'vector': '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'}

cvssV4_0

{'score': 5.3, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-09-30T19:55:03.125Z

Reserved: 2026-09-30T14:07:47.711Z

Link: CVE-2026-103387

cve-icon Vulnrichment

Updated: 2026-09-30T19:54:58.745Z

cve-icon NVD

Status : Received

Published: 2026-09-30T20:17:30.620

Modified: 2026-09-30T20:17:30.620

Link: CVE-2026-103387

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses