CVE-2023-34415

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.

• CWE-601

• https://bugzilla.mozilla.org/show_bug.cgi?id=1811999Permissions Required
• https://security.gentoo.org/glsa/202401-10
• https://www.mozilla.org/security/advisories/mfsa2023-20/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1811999Permissions Required
• https://security.gentoo.org/glsa/202401-10
• https://www.mozilla.org/security/advisories/mfsa2023-20/Vendor Advisory

Published

Jun 19, 2023

Last Modified

Jun 17, 2026

Status

Modified

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