CVE-2026-113399: Incorrect boundary conditions in the SVG component

Published Oct 20, 2026
·
Updated

Incorrect boundary conditions in the SVG component. This vulnerability was fixed in Firefox 158.0.1 and Thunderbird 158.0.1.

Affected Software

3 affected componentsFixes available
Mozilla Firefox<158.0.1
Mozilla Firefox<158.0.1
158.0.1
Mozilla Thunderbird<158.0.1
158.0.1

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 158.0.1
  2. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 158.0.1
  3. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 158.0.1

Event History

Oct 20, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·12:58 PM
Data Sourced
via MITRE·12:58 PM
Description
Data Sourced
via NVD·01:16 PM
Description

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Which Firefox release includes the fix?

The vulnerability was fixed in Firefox 158.0.1.

Company

Resources

Contact

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