CVE-2026-103387 (GCVE-0-2026-103387)
Vulnerability from cvelistv5 – Published: 2026-09-30 19:45 – Updated: 2026-09-30 19:55
VLAI
EPSS
VEX
Title
garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:54 UTC
CWE
- CWE-248 - Uncaught Exception
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/412124 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/412124/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-103387 | third-party-advisory |
| https://vuldb.com/submit/956810 | third-party-advisory |
| https://github.com/garycourt/uri-js/issues/103 | exploitissue-tracking |
| https://github.com/garycourt/uri-js/ | product |
Impacted products
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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