CVE-2026-117942
Received Received - Intake

Incorrect Boundary Conditions in Firefox JavaScript Engine JIT

Publication date: 2026-10-27

Last updated on: 2026-10-27

Assigner: Mozilla Corporation

Description
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.

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Meta Information

Published
2026-10-27
Last Modified
2026-10-27
Generated
2026-10-27
AI Q&A
2026-10-27
EPSS Evaluated
N/A
NVD
CVE-2026-117942
EUVD
EUVD-2026-110973

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves incorrect boundary conditions in the JavaScript Engine's JIT component. It allows potential memory corruption or unexpected behavior due to improper handling of data limits during execution.

Impact Analysis

An attacker could exploit this to execute arbitrary code, crash the browser, or bypass security mechanisms. Users running vulnerable Firefox versions may face system compromise or data theft if exploited.

Mitigation Strategies

Update Firefox to version 159 or later, Firefox ESR 115.44 or later, or Firefox ESR 153.6 or later to address the vulnerability.

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