CVE-2026-75874
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Sandbox Escape in Firefox Remote Settings Client

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-75874
EUVD
EUVD-2026-60674

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 154

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a sandbox escape vulnerability in the Remote Settings Client component of Firefox. It allows malicious code to break out of the sandboxed environment, potentially gaining unauthorized access to the host system.

Detection Guidance

This vulnerability is specific to Firefox versions before 154. Detection involves checking installed Firefox versions. Use commands like 'firefox --version' or 'dpkg -l firefox' on Linux to verify the version. If the version is below 154, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow an attacker to run arbitrary code on your system outside the sandbox. This could lead to data theft, malware installation, or further compromise of your device.

Mitigation Strategies

Update Firefox to version 154 or later to address the sandbox escape vulnerability in the Remote Settings Client component.

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