PT-2026-45410 · Mozilla · Firefox For Ios

Muneaki Nishimura · Published 2026-06-01 · Updated 2026-06-03 · CVE-2026-9308

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox for iOS versions prior to 151.2

Description Reader View in Firefox for iOS replaced page content in its HTML template before substituting other internal placeholders. A malicious page could include a placeholder string that was subsequently replaced with JSON-LD (JavaScript Object Notation for Linked Data, a format for describing structured data) data, which could lead to arbitrary JavaScript execution.

Recommendations Update to version 151.2.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-9308

Affected Products

Firefox For Ios

References · 6

• https://mozilla.org/security/advisories/mfsa2026-53 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-9308 · Security Note
• https://twitter.com/VulmonFeeds/status/2061447276459893071 · Twitter Post
• https://twitter.com/dailycve/status/2062316376388186196 · Twitter Post
• https://bugzilla.mozilla.org/show_bug.cgi?id=2039422 · Note
• https://t.me/CVEtracker/55491 · Telegram Post