Content Overwrite Vulnerability in Firefox for iOS by Mozilla
CVE-2026-14906

5.3MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox For iOS
Vendor
CVE Published:
13 July 2026

What is CVE-2026-14906?

A vulnerability exists in the Firefox for iOS application that could allow maliciously crafted page titles to overwrite saved PDF content, jeopardizing the integrity of user documents. This issue affects versions prior to Firefox for iOS 152.4, where it has been effectively addressed. Users are encouraged to update to the latest version to mitigate potential risks associated with this vulnerability.

Affected Version(s)

Firefox for iOS 152.4

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2045842
https://www.mozilla.org/security/advisories/mfsa2026-66/

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muneaki Nishimura
.