URIjs Hostname spoofing via backslashes in URL

Description

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.

Recommendation

Update the urijs package to the latest compatible version. Followings are version details:

• Affected version(s): < 1.19.6
• Patched version(s): 1.19.6

References

• GHSA-p6j9-7xhc-rhwp
• advisory.checkmarx.net
• CVE-2021-27516
• CWE-20
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• min-document vulnerable to prototype pollution - CVE-2025-57352
• Vite bypasses server.fs.deny when using ?raw?? - CVE-2025-30208
• GetmeUK ContentTools Cross-Site Scripting (XSS) - CVE-2025-2699
• node-gettext vulnerable to Prototype Pollution - CVE-2024-21528

Tags:

npm

urijs