CVE-2026-2634

CRITICAL 9.8

Spoofed web content presented under trusted domains using scripted navigation on Firefox iOS

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed domains. This vulnerability was fixed in Firefox for iOS 147.4.

Vendor	mozilla
Product	firefox for ios
Ecosystems	Browser JavaScript
Industries	Technology
Published	Feb 24, 2026
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Firefox for iOS

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1975529 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-12/

Credits

Renwa