CVE-2026-109706: Use-after-free in the Storage: IndexedDB component

Published Oct 13, 2026
·
Updated

Use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.

Affected Software

3 affected componentsFixes available
Mozilla Firefox<158
158
Mozilla Firefox ESR<115.43
115.43
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 158
  2. Upgrade

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

    Fixed in 115.43
  3. Upgrade

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

    Fixed in 153.5
  4. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 158
  5. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 115.43
  6. 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
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What does an attacker need to exploit this issue?

The CVSS vector indicates the attack can be delivered over a network without prior authentication, but requires user interaction. Successful exploitation may result in limited confidentiality and integrity impact.

2

Which Firefox installations should be updated?

Update Firefox to version 158 or later, Firefox ESR 115 to 115.43 or later, and Firefox ESR 153 to 153.5 or later. These are the versions identified as containing the fix.

3

How can I determine whether a deployment has the fix?

Check the installed Firefox or Firefox ESR version and compare it with the fixed versions: Firefox 158, ESR 115.43, or ESR 153.5. Installations below the applicable fixed release should be treated as needing an update.

Company

Resources

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