Description

A flaw was found in fast-uri. The library incorrectly decodes percent-encoded characters in protocol schemes prior to validation, causing invalid or prohibited schemes to be accepted as valid. A remote attacker can exploit this vulnerability by submitting a specially crafted Uniform Resource Identifier (URI) to bypass application allowlists, potentially leading to Cross-Site Scripting (XSS) if the normalized output is rendered in a web browser.

Mitigation

Aliases