CVE-2023-34415

MEDIUM
6.1
CVSS Score
Published: June 19, 2023 at 10:40 AM UTC
Updated: June 17, 2026 at 06:03 AM UTC
1 product affected across 1 vendorFirefox

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 114
Affected range stops below 114, so it looks safe — our inference, not a vendor statement
Affected range stops below 114.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-601

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