CVE-2026-16402
Undergoing Analysis Undergoing Analysis - In Progress

Integer Overflow in Firefox ImageLib Component

Publication date: 2026-07-21

Last updated on: 2026-07-24

Assigner: Mozilla Corporation

Description
Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

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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-2026-16402
EUVD
EUVD-2026-46240

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla thunderbird to 153.0 (exc)
mozilla firefox to 153.0.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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Executive Summary

This vulnerability is an integer overflow in the Graphics: ImageLib component of Firefox. An integer overflow occurs when a calculation produces a result larger than the maximum value that can be stored in the data type, potentially leading to unexpected behavior or crashes.

Impact Analysis

An attacker could exploit this vulnerability to cause Firefox to crash or execute arbitrary code, potentially leading to data loss or unauthorized access to your system. Updating to Firefox 153 or later mitigates this risk.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description only mentions an integer overflow in the Graphics: ImageLib component of Firefox, fixed in version 153.

Mitigation Strategies

Update Firefox to version 153 or later to address the integer overflow vulnerability in the Graphics: ImageLib component.

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