CVE-2026-6750

Modified Modified - Updated After Analysis

Privilege Escalation in Firefox WebRender Component

Publication date: 2026-04-21

Last updated on: 2026-06-30

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-21

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-04-21

EPSS Evaluated

2026-07-05

NVD

CVE-2026-6750

EUVD

EUVD-2026-24091

Affected Vendors & Products

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

KEV

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.
CWE-266	A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

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.

Hi! I’m here to help you understand CVE-2026-6750. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70