URIjs Vulnerable to 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 combination of backslash (\) and slash (/) characters 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): < 1.19.7
• Patched version(s): 1.19.7

References

• GHSA-89gv-h8wf-cg8r
• huntr.dev
• CVE-2021-3647
• CWE-601
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A6

Related Issues

• URIjs Hostname spoofing via backslashes in URL - CVE-2021-27516
• Hostname spoofing via backslashes in URL - CVE-2020-26291
• Astro vulnerable to URL manipulation via headers, leading to middleware and CVE-2025-61925 bypass - CVE-2025-64525
• axios Requests Vulnerable To Possible SSRF and Credential Leakage via Absolute URL - CVE-2025-27152

Tags:

npm

urijs