CVE-2026-9308: Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a…

PriorityP427medium5.4CVSS 3.1

AVNACLPRNUIRSUCLILAN

EPSS

0.16%

5.3th percentile

Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. This vulnerability was fixed in Firefox for iOS 151.2.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
mozilla	firefox	< 151.2	151.2
mozilla	firefox_for_ios	< Firefox for iOS 151.2	Firefox for iOS 151.2

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