A spoofing vulnerability can occur when a malicious site with an extremely long domain name is opened in an Android Custom Tab (a browser panel inside another app) and the default browser is Firefox for Android. This could allow an attacker to spoof which page is actually loaded and in use. Note: this issue only affects Firefox for Android. Other versions and operating systems are unaffected. This vulnerability affects Firefox < 59.

Related CVEs

CVE-2018-5138

Key Information

GHSA ID

GHSA-cq34-8vfv-756h

Published

May 14, 2022 3:09 AM

Last Modified

May 14, 2022 3:09 AM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: September 13, 2025 6:30 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.