CVE-2026-2782: Privilege escalation in the Netmonitor component

Published Feb 24, 2026
·
Updated

Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8.

Other sources

Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

— MITRE

Affected Software

8 affected componentsFixes available
Mozilla Firefox<148
148
Mozilla Firefox ESR<140.8
140.8
Mozilla Thunderbird<148
148
Mozilla Thunderbird<140.8
140.8
Mozilla Firefox<140.8.0
Mozilla Firefox<148.0
Mozilla Thunderbird<140.8.0
Mozilla Thunderbird<148.0

Event History

Feb 24, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·01:33 PM
Data Sourced
via MITRE·01:33 PM
Description
Data Sourced
via Red Hat·02:05 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·02:16 PM
DescriptionSeverityWeaknessAffected Software
Jan 4, 58137
Event
via FIRST·02:07 PM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-2782?

CVE-2026-2782 is classified as a privilege escalation vulnerability.

2

How do I fix CVE-2026-2782?

To resolve CVE-2026-2782, update Firefox to version 148 or later, or Firefox ESR to version 140.8 or later.

3

Which versions of Firefox are affected by CVE-2026-2782?

CVE-2026-2782 affects Firefox versions prior to 148 and Firefox ESR versions prior to 140.8.

4

What components are involved in CVE-2026-2782?

CVE-2026-2782 involves a vulnerability in the Netmonitor component of the affected Firefox versions.

5

Can CVE-2026-2782 lead to system compromise?

Yes, CVE-2026-2782 can potentially allow attackers to escalate their privileges on the affected systems.

Company

Resources

Contact

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