# CVE-2026-9078: Mozilla Firefox for iOS address spoofing in link preview

Source: https://junglewise.ai/threats/cve-2026-9078-mozilla-firefox-for-ios-address-spoofing-in-link-preview  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-25. Updated: 2026-05-26  
License: CC BY 4.0 with a link back

CVE-2026-9078 · Severity: info · Published 2026-05-25

Mozilla Firefox for iOS is a mobile web browser. A vulnerability in how the browser displays link previews could allow a malicious website to disguise its true identity. By using specially formatted characters, an attacker can make a dangerous link appear to belong to a trusted organization, potentially leading users to provide sensitive information to a fraudulent site.

Technologies: [Mozilla Firefox for iOS](https://junglewise.ai/threats/technologies/firefox-for-ios). Vendors: [Mozilla](https://junglewise.ai/threats/vendors/mozilla).

## Quick answers

**Is CVE-2026-9078 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9078 being exploited in the wild.

**How severe is CVE-2026-9078?** Informational severity, published 25 May 2026.

**Which products and versions are affected?** Mozilla Firefox for iOS versions prior to 151.1.

**Is there a fix for CVE-2026-9078?** A patch was published on 2026-05-25: Fixed in Firefox for iOS 151.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-9078 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-9078?** Check whether you run Mozilla Firefox for iOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A domain name spoofing vulnerability exists in Firefox for iOS due to improper handling of Right-to-Left (RTL) characters and Internationalized Domain Names (IDNs) within the link preview UI. By crafting a specific hostname using RTL characters, an attacker can trigger a visual reordering of the domain string. This allows an attacker-controlled domain to be displayed as a trusted origin to the user. This is a UI spoofing flaw that requires a user to interact with or view a malicious link. The issue is resolved in Firefox for iOS version 151.1.

## Affected products

- Mozilla Firefox for iOS versions prior to 151.1

## Timeline

- 2026-05-25: advisory: Mozilla Foundation Security Advisory 2026-52 released
- 2026-05-25: patched: Fixed in Firefox for iOS 151.1

## References

- [https://bugzilla.mozilla.org/show_bug.cgi?id=2029371](https://bugzilla.mozilla.org/show_bug.cgi?id=2029371)
- [https://www.mozilla.org/security/advisories/mfsa2026-52/](https://www.mozilla.org/security/advisories/mfsa2026-52/)

## Related threats

- [Mozilla Firefox for iOS privilege escalation](https://junglewise.ai/threats/cve-2026-121843-privilege-escalation-in-firefox-for-ios-this-vulnerability-was)
- [Mozilla Firefox for iOS privilege escalation in Reader View](https://junglewise.ai/threats/cve-2026-121842-privilege-escalation-in-the-reader-view-component-in-firefox-for)
- [Firefox for iOS information disclosure](https://junglewise.ai/threats/cve-2026-121841-other-issue-in-firefox-for-ios-this-vulnerability-was-fixed-in)
- [Firefox for iOS FaceTime protocol handler spoofing](https://junglewise.ai/threats/cve-2026-116632-a-malicious-web-page-could-insert-arbitrary-text-into-the)
- [Firefox for iOS external protocol handler spoofing via tel link](https://junglewise.ai/threats/cve-2026-116631-a-malicious-web-page-could-open-a-tel-link-in-a-window-that-was)