CVE-2026-9078: Firefox iOS RTL Domain Rendering Issue in Link Preview

Published May 25, 2026
·
Updated

Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces. A crafted RTL hostname could visually reorder portions of the displayed domain, causing attacker-controlled sites to appear as trusted origins.

Affected Software

4 affected components
Mozilla Firefox for iOS<151.1
All of the following
Mozilla Firefox=151.1
Apple iOS
Mozilla Firefox Iphone Os<151.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Firefox for iOS to a version that resolves this vulnerability.

    Fixed in 151.1

Event History

May 25, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·02:05 PM
Data Sourced
via MITRE·02:05 PM
Description
Data Sourced
via NVD·03:16 PM
DescriptionSeverityWeaknessAffected Software
Jun 29, 58424
Event
via FIRST·06:22 AM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-9078?

The severity of CVE-2026-9078 is medium with a CVSS score of 5.4.

2

How do I fix CVE-2026-9078?

To fix CVE-2026-9078, update Mozilla Firefox for iOS and any affected versions to the latest available release.

3

What does CVE-2026-9078 affect?

CVE-2026-9078 affects Mozilla Firefox for iOS, Mozilla Firefox, and Apple iOS.

4

What is the risk associated with CVE-2026-9078?

CVE-2026-9078 has a risk score of 24, indicating potential security vulnerabilities in the application.

5

What is the main issue reported in CVE-2026-9078?

The main issue in CVE-2026-9078 is the incorrect rendering of right-to-left domain names in the link preview UI, which can mislead users.

Company

Resources

Contact

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