CVE-2026-16352

Analyzed Analyzed - Analysis Complete

Sandbox Escape via Use-After-Free in Firefox

Publication date: 2026-07-21

Last updated on: 2026-07-24

Assigner: Mozilla Corporation

Description

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-21

Last Modified

2026-07-24

Generated

2026-08-10

AI Q&A

2026-07-21

EPSS Evaluated

2026-08-09

NVD

CVE-2026-16352

EUVD

EUVD-2026-46193

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 153.0.0 (exc)
mozilla	firefox	to 115.38.0 (exc)
mozilla	firefox	From 128.1.0 (inc) to 140.13.0 (exc)
mozilla	thunderbird	to 140.13.0 (exc)
mozilla	thunderbird	From 141.0 (inc) to 153.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a sandbox escape vulnerability caused by a use-after-free error in Firefox's Disability Access APIs component. It allows malicious code to break out of the browser's security sandbox, potentially gaining unauthorized access to system resources or other sensitive data.

Detection Guidance

This vulnerability is fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. To detect if your system is vulnerable, check the installed Firefox version using commands like 'firefox --version' or 'about:support' in the browser. If the version is below these thresholds, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow attackers to escape the browser sandbox and execute arbitrary code on your system with the same privileges as the Firefox process. This could lead to data theft, installation of malware, or further compromise of your device.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The vulnerability involves a sandbox escape due to use-after-free in Disability Access APIs, but no direct impact on regulatory compliance is mentioned.

Mitigation Strategies

Update Firefox to version 153 or later, Firefox ESR 115.38 or later, or Firefox ESR 140.13 or later. Mozilla has patched this issue in these versions, so applying the latest updates will mitigate the vulnerability.

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