CVE-2026-14906: Vulnerability in Mozilla Firefox for iOS
A vulnerability in Mozilla Firefox for iOS allowed pages with malicious titles to potentially overwrite saved PDF files or bundled PDF content within the app sandbox. This issue was addressed in Firefox for iOS version 152.4. The vulnerability has a medium severity rating with a CVSS score of 5.3 and does not require user interaction or privileges to exploit.
AI Analysis
Technical Summary
CVE-2026-14906 is a vulnerability in Firefox for iOS where malicious webpage titles could enable overwriting of saved PDF files or bundled PDF resources within the application's sandbox environment. This could lead to unauthorized modification of PDF content stored by the browser. The issue was fixed in Firefox for iOS version 152.4. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type). The CVSS v3.1 base score is 5.3 (medium severity), with attack vector network, low attack complexity, no privileges required, no user interaction, and limited confidentiality impact.
Potential Impact
The vulnerability allows an attacker controlling webpage titles to overwrite PDF files saved by the user or bundled PDF content within Firefox for iOS's sandbox. This could result in unauthorized modification of PDF content accessible through the application. The impact is limited to confidentiality loss; integrity and availability are not affected. There are no known exploits in the wild.
Mitigation Recommendations
This vulnerability is fixed in Firefox for iOS version 152.4. Users and administrators should update to version 152.4 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-14906: Vulnerability in Mozilla Firefox for iOS
Description
A vulnerability in Mozilla Firefox for iOS allowed pages with malicious titles to potentially overwrite saved PDF files or bundled PDF content within the app sandbox. This issue was addressed in Firefox for iOS version 152.4. The vulnerability has a medium severity rating with a CVSS score of 5.3 and does not require user interaction or privileges to exploit.
CVSS v3.1
Score 5.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-14906 is a vulnerability in Firefox for iOS where malicious webpage titles could enable overwriting of saved PDF files or bundled PDF resources within the application's sandbox environment. This could lead to unauthorized modification of PDF content stored by the browser. The issue was fixed in Firefox for iOS version 152.4. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type). The CVSS v3.1 base score is 5.3 (medium severity), with attack vector network, low attack complexity, no privileges required, no user interaction, and limited confidentiality impact.
Potential Impact
The vulnerability allows an attacker controlling webpage titles to overwrite PDF files saved by the user or bundled PDF content within Firefox for iOS's sandbox. This could result in unauthorized modification of PDF content accessible through the application. The impact is limited to confidentiality loss; integrity and availability are not affected. There are no known exploits in the wild.
Mitigation Recommendations
This vulnerability is fixed in Firefox for iOS version 152.4. Users and administrators should update to version 152.4 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-06T21:26:25.464Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-66/","vendor":"Mozilla"}]
Threat ID: 6a55366a68715ace43b0b296
Added to database: 07/13/2026, 19:03:06 UTC
Last enriched: 07/20/2026, 19:26:14 UTC
Last updated: 08/25/2026, 22:52:09 UTC
Views: 75
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