CVE-2026-14906Network attack vector

Sandboxed resource overwrite via malicious page titles

Published Jul 13, 2026 · Updated Jul 13, 2026

File overwrite in Mozilla Firefox for iOS before 152.4 allows remote attackers to replace sandboxed PDFs or bundled content. The webpage-to-PDF save flow derives its destination from a page-controlled title and permits that name to collide with existing application resources. The malicious page must be saved as a PDF, and resulting writes remain inside the Firefox application sandbox.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File overwrite in Mozilla Firefox for iOS before 152.4 allows remote attackers to replace sandboxed PDFs or bundled content. The webpage-to-PDF save flow derives its destination from a page-controlled title and permits that name to collide with existing application resources. The malicious page must be saved as a PDF, and resulting writes remain inside the Firefox application sandbox.

The record

CVE
CVE-2026-14906
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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