CVE-2026-9308

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.4 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N                                    

Vulnerability 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.

Vulnerability Details

Published Date

June 01, 2026

Last Modified

June 03, 2026

CWE ID

CWE-79

Source

NVD

Vendor

mozilla

Product

firefox

External References

https://bugzilla.mozilla.org/show_bug.cgi?id=2039422
https://www.mozilla.org/security/advisories/mfsa2026-53/

CVE-2026-9308

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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