CVE-2026-9308

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-9308
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.

5.4 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2039422 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-53/ Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:iphone_os:*:*
History

03 Jun 2026, 20:02

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2039422 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2039422 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-53/ - () https://www.mozilla.org/security/advisories/mfsa2026-53/ - Vendor Advisory
First Time Mozilla
Mozilla firefox
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:*:iphone_os:*:*

01 Jun 2026, 15:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.4
CWE CWE-79

01 Jun 2026, 13:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-01 13:16

Updated : 2026-06-03 20:02

NVD link : CVE-2026-9308

Mitre link : CVE-2026-9308

CVE.ORG link : CVE-2026-9308

JSON object : View

Products Affected

mozilla

  • firefox
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')