CVE-2026-124894: Use-after-free in the Networking: Cookies component

Published Nov 10, 2026
·
Updated

Use-after-free in the Networking: Cookies component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.

Affected Software

4 affected componentsFixes available
Mozilla Firefox<160
Mozilla Firefox ESR<153.7
Mozilla Firefox ESR<153.7
153.7
Mozilla Firefox<160
160

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 153.7
  2. Upgrade

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

    Fixed in 160
  3. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 160
  4. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 153.7

Event History

Nov 10, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·01:28 PM
Data Sourced
via MITRE·01:28 PM
Description
Data Sourced
via NVD·02:17 PM
DescriptionSeverityWeakness
Event
via NVD·02:17 PM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

Which Firefox releases contain the fix?

The issue was fixed in Firefox 160 and Firefox ESR 153.7.

2

What level of attacker access is indicated by the severity vector?

The vector indicates that exploitation can be attempted over the network with low attack complexity and requires no privileges, but it requires user interaction. Successful exploitation can affect confidentiality, integrity, and availability.

Company

Resources

Contact

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