CVE-2026-6750
Received Received - Intake
Privilege Escalation in Firefox WebRender Component

Publication date: 2026-04-21

Last updated on: 2026-04-24

Assigner: Mozilla Corporation

Description
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
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Meta Information
Published
2026-04-21
Last Modified
2026-04-24
Generated
2026-06-16
AI Q&A
2026-04-21
EPSS Evaluated
2026-06-14
NVD
CVE-2026-6750
EUVD
EUVD-2026-24091
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 150.0 (exc)
mozilla firefox to 115.35.0 (exc)
mozilla firefox From 140.0 (inc) to 140.10.0 (exc)
mozilla thunderbird to 140.10.0 (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 Graphics: WebRender component of Mozilla Firefox. Privilege escalation means that an attacker could gain higher-level permissions than intended, potentially allowing them to execute unauthorized actions within the affected software.

The issue was addressed and fixed in Firefox version 150, Firefox ESR 115.35, and Firefox ESR 140.10.

Impact Analysis

Exploitation of this vulnerability could allow an attacker to escalate their privileges within the Firefox browser environment. This could lead to unauthorized actions such as executing code with higher permissions, potentially compromising the security and integrity of the user's system or data accessed through the browser.

Mitigation Strategies

To mitigate this privilege escalation vulnerability in the Graphics: WebRender component, update your Firefox browsers to version 150 or later, or Firefox ESR to versions 115.35 or 140.10 or later.

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