Description
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.
Published: 2026-06-01
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 03 Jun 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla firefox
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:iphone_os:*:*
Vendors & Products Mozilla firefox

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 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.
Title Arbitrary JavaScript execution in Reader View due to wrong HTML replacement order
References

Subscriptions

Mozilla Firefox Firefox For Ios
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-06-01T13:52:59.059Z

Reserved: 2026-05-22T18:16:25.742Z

Link: CVE-2026-9308

cve-icon Vulnrichment

Updated: 2026-06-01T13:52:02.702Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-01T13:16:33.523

Modified: 2026-06-03T20:02:52.693

Link: CVE-2026-9308

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-01T16:30:06Z

Weaknesses