CVE-2026-6749
Received Received - Intake
Information Disclosure via Uninitialized Memory in Firefox Canvas2D

Publication date: 2026-04-21

Last updated on: 2026-04-22

Assigner: Mozilla Corporation

Description
Information disclosure due to uninitialized memory in the Graphics: Canvas2D 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
2026-04-22
Generated
2026-06-16
AI Q&A
2026-04-21
EPSS Evaluated
2026-06-15
NVD
CVE-2026-6749
EUVD
EUVD-2026-24090
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-908 The product uses or accesses a resource that has not been initialized.
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Executive Summary

This vulnerability is an information disclosure issue caused by uninitialized memory in the Graphics: Canvas2D component of Firefox. Essentially, some memory that should have been properly initialized before use was not, which could lead to unintended exposure of sensitive data.

Impact Analysis

The impact of this vulnerability is information disclosure. An attacker could potentially access sensitive information from uninitialized memory within the Canvas2D graphics component, which might include data from other processes or users.

Mitigation Strategies

To mitigate this vulnerability, update your Firefox browser to version 150 or later, or update Firefox ESR to versions 115.35 or 140.10 or later where the issue has been fixed.

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