Input validation error in Firefox for iOS - CVE-2026-14906
Published: July 22, 2026
Vulnerability identifier: #VU139187
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-14906
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for iOS
Firefox for iOS
Detailed vulnerability description
The vulnerability allows a remote attacker to overwrite PDF files or bundled application content within the application sandbox.
The vulnerability exists due to improper input validation in the webpage title handling for saving webpages as PDFs when processing a webpage with a malicious title. A remote attacker can supply a webpage with a crafted title to overwrite PDF files or bundled application content within the application sandbox.
How to mitigate CVE-2026-14906
Install security update from vendor's website.