CVE-2026-9309 (GCVE-0-2026-9309)

Vulnerability from cvelistv5 – Published: 2026-06-01 11:24 – Updated: 2026-06-01 13:51
VLAI?
Title
Arbitrary JavaScript execution in internal pages via Reader View JSON-LD injection
Summary
Firefox for iOS Reader View did not properly escape HTML tags in JSON-LD metadata. A malicious page could inject markup that changed Reader View behavior and leaked sensitive URL parameters. These parameters could then be used to access internal pages, potentially resulting in arbitrary JavaScript execution in an internal origin. 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
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox for iOS Unaffected: 151.2 , ≤ * (rpm)
Create a notification for this product.
Credits
Muneaki Nishimura
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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