GHSA-p6j9-7xhc-rhwp URIjs Hostname spoofing via backslashes in URL

• npm urijs: < 1.19.6 → fixed in 1.19.6

Impact If using affected versions to determine a URL's hostname, the hostname can be spoofed by using a backslash (`\`) character as part of the scheme delimiter, e.g. `scheme:/\hostname`. If the hostname is used in security decisions, the decision may be incorrect. Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior. Example URL: `https:/\expected-example.com/path` Escaped string: `https:/\\expected-example.com/path` (JavaScript strings must escape backslash) Affected versions incorrectly return no hostname. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class. Patches Version 1.19.6 is patched against all known payload variants. References https://github.com/medialize/URI.js/releases/tag/v1.19.6 (fix for this particular bypass) https://github.com/medialize/URI.js/releases/tag/v1.19.4 (fix for related bypass) https://github.com/medialize/URI.js/releases/tag/v1.19.3 (fix for related bypass) PR #233 (initial fix for backslash handling) For more information If you have any questions or comments about this advisory, open an issue in https://github.com/medialize/URI.js Reporter credit Yaniv Nizry from the CxSCA AppSec team at Checkmarx