CVE-2026-109782: Mitigation bypass in the File Handling component

Published Oct 13, 2026
·
Updated

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox ESR 153.5.

Affected Software

1 affected componentFixes available
Mozilla Firefox ESR<153.5
153.5

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 153.5
  2. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 153.5

Event History

Oct 13, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·12:29 PM
Data Sourced
via MITRE·12:29 PM
Description
Data Sourced
via NVD·01:17 PM
Description

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Which Firefox ESR release contains the fix?

The vulnerability was fixed in Firefox ESR 153.5.

2

What mitigation is bypassed by this issue?

The available information identifies the affected area as the File Handling component, but does not specify which mitigation can be bypassed or the conditions required for exploitation.

Company

Resources

Contact

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