CVE-2026-9308 — Arbitrary JavaScript execution in Reader View due to wrong HTML replacement order
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…
Published: 2026-06-01 · CVSS: 5.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7