When a network error occurred during page load, the prior content could have remained in view with a blank URL bar. This could have been used to obfuscate a spoofed web site. This vulnerability affects Firefox < 126.
{ "binaries": [ { "binary_version": "126.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox" }, { "binary_version": "126.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-dev" }, { "binary_version": "126.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-geckodriver" }, { "binary_version": "126.0+build2-0ubuntu0.20.04.1", "binary_name": "firefox-mozsymbols" } ], "availability": "No subscription required" }