CVE-2026-16402: Vulnerability in Mozilla Firefox
CVE-2026-16402 is an integer overflow vulnerability in the Graphics: ImageLib component of Mozilla Firefox. This vulnerability was fixed in Firefox version 153. It has a critical CVSS score of 9.8, indicating high severity with potential for complete confidentiality, integrity, and availability impact. The vulnerability affects all Firefox versions prior to 153. Mozilla has released an official fix in Firefox 153 to address this issue.
AI Analysis
Technical Summary
CVE-2026-16402 is an integer overflow vulnerability located in the Graphics: ImageLib component of Mozilla Firefox. The flaw could allow an attacker to cause memory corruption or other impacts related to integer overflow errors. This vulnerability was resolved in Firefox 153. The CVSS 3.1 base score is 9.8 (critical), with attack vector network, low attack complexity, no privileges required, no user interaction, and full impact on confidentiality, integrity, and availability. The vendor advisory confirms the fix was included in Firefox 153.
Potential Impact
The vulnerability has a critical impact, potentially allowing remote attackers to execute arbitrary code or cause denial of service due to integer overflow in the graphics library. The CVSS score of 9.8 reflects the high severity and the potential for complete compromise of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. Since this is not a cloud service, patching the client software is required to mitigate the risk.
CVE-2026-16402: Vulnerability in Mozilla Firefox
Description
CVE-2026-16402 is an integer overflow vulnerability in the Graphics: ImageLib component of Mozilla Firefox. This vulnerability was fixed in Firefox version 153. It has a critical CVSS score of 9.8, indicating high severity with potential for complete confidentiality, integrity, and availability impact. The vulnerability affects all Firefox versions prior to 153. Mozilla has released an official fix in Firefox 153 to address this issue.
CVSS v3.1
Score 9.8critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16402 is an integer overflow vulnerability located in the Graphics: ImageLib component of Mozilla Firefox. The flaw could allow an attacker to cause memory corruption or other impacts related to integer overflow errors. This vulnerability was resolved in Firefox 153. The CVSS 3.1 base score is 9.8 (critical), with attack vector network, low attack complexity, no privileges required, no user interaction, and full impact on confidentiality, integrity, and availability. The vendor advisory confirms the fix was included in Firefox 153.
Potential Impact
The vulnerability has a critical impact, potentially allowing remote attackers to execute arbitrary code or cause denial of service due to integer overflow in the graphics library. The CVSS score of 9.8 reflects the high severity and the potential for complete compromise of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. Since this is not a cloud service, patching the client software is required to mitigate the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:57:35.982Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cc22a4a8d5989262952
Added to database: 07/21/2026, 12:57:38 UTC
Last enriched: 07/30/2026, 09:53:38 UTC
Last updated: 09/04/2026, 10:52:07 UTC
Views: 58
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