CVE-2026-9078

MEDIUM

Firefox iOS RTL Domain Rendering Issue in Link Preview

Title source: cna

Description

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. This vulnerability was fixed in Firefox for iOS 151.1.

References (2)

Core 2

Core References

https://bugzilla.mozilla.org/show_bug.cgi?id=2029371

https://www.mozilla.org/security/advisories/mfsa2026-52/

Scores

CVSS v3 5.4

EPSS 0.0020

EPSS Percentile 9.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-451

Status published

Products (2)

mozilla/firefox < 151.1

Mozilla/Firefox for iOS 151.1

Published May 25, 2026

Tracked Since May 25, 2026