CVE-2026-100786
Received Received - Intake

Graphics Component Use-After-Free Sandbox Escape in Firefox

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: Mozilla Corporation

Description
Sandbox escape due to use-after-free in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100786
EUVD
EUVD-2026-88938

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 153.4
mozilla firefox 157
mozilla firefox 115.42
mozilla firefox 140.17

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a sandbox escape vulnerability caused by a use-after-free error in the Graphics component of Firefox. A use-after-free occurs when a program continues to use memory after it has been freed, potentially allowing attackers to execute arbitrary code or escape the browser sandbox.

Impact Analysis

This vulnerability could allow malicious websites or code to break out of the browser sandbox, gaining access to the host system. This might lead to unauthorized code execution, data theft, or further compromise of the affected device.

Mitigation Strategies

Update Firefox to version ESR 153.4, Firefox 157, ESR 115.42, or ESR 140.17 or later to address the sandbox escape vulnerability.

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