CVE-2026-2782
Received Received - Intake
Privilege Escalation in Firefox Netmonitor Component

Publication date: 2026-02-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
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Meta Information
Published
2026-02-24
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2026-02-24
EPSS Evaluated
2026-06-14
NVD
CVE-2026-2782
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)
mozilla thunderbird to 140.8.0 (exc)
mozilla firefox to 140.8.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-269 The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
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Executive Summary

This vulnerability is a privilege escalation issue found in the Netmonitor component of Firefox versions earlier than 148 and Firefox ESR versions earlier than 140.8.

Impact Analysis

An attacker exploiting this vulnerability could gain elevated privileges within the affected Firefox browser, potentially allowing them to perform actions or access data beyond their normal permissions.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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