CVE-2023-34415 Information

Description

When choosing a site-isolated process for a document loaded from a data: URL that was the result of a redirect Firefox would load that document in the same process as the site that issued the redirect. This bypassed the site-isolation protections against Spectre-like attacks on sites that host an \open redirect. Firefox no longer follows HTTP redirects to data: URLs. This vulnerability affects Firefox < 114.

Reference

https://www.mozilla.org/security/advisories/mfsa2023-20/ https://bugzilla.mozilla.org/show_bug.cgi?id=1811999