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.

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History

Mon, 01 Jun 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox For Ios
Vendors & Products Mozilla
Mozilla firefox For Ios

Mon, 01 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 01 Jun 2026 13:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Arbitrary JavaScript execution in internal pages via Reader View JSON-LD injection
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-06-01T13:51:37.592Z

Reserved: 2026-05-22T18:16:52.497Z

Link: CVE-2026-9309

cve-icon Vulnrichment

Updated: 2026-06-01T13:51:19.816Z

cve-icon NVD

Status : Received

Published: 2026-06-01T13:16:33.623

Modified: 2026-06-01T15:16:39.620

Link: CVE-2026-9309

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-01T16:00:17Z

Weaknesses