CVE-2026-2796
Modified Modified - Updated After Analysis

JIT Miscompilation in Firefox WebAssembly Causes Potential Execution Flaws

Publication date: 2026-02-24

Last updated on: 2026-06-30

Assigner: Mozilla Corporation

Description
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

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Meta Information

Published
2026-02-24
Last Modified
2026-06-30
Generated
2026-07-06
AI Q&A
2026-02-24
EPSS Evaluated
2026-07-05
NVD
CVE-2026-2796
EUVD
EUVD-2026-8449

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-843 The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

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Executive Summary

This vulnerability is a JIT (Just-In-Time) miscompilation issue in the JavaScript WebAssembly component of Firefox versions earlier than 148.

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