CVE-2026-9308 (GCVE-0-2026-9308)

Vulnerability from cvelistv5 – Published: 2026-06-01 11:24 – Updated: 2026-06-01 13:52
VLAI
Title
Arbitrary JavaScript execution in Reader View due to wrong HTML replacement order
Summary
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.
Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-01 13:52 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
mozilla CNA under the mitre root
CNA scorecard E 38/100 over 679 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Mozilla Firefox for iOS Unaffected: 151.2 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Muneaki Nishimura
Show details on NVD website
To clipboard 

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