CVE-2026-16369: Vulnerability in Mozilla Firefox
Integer overflow in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
AI Analysis
Technical Summary
CVE-2026-16369 describes an integer overflow vulnerability in the JavaScript: WebAssembly component of Firefox. This vulnerability could potentially lead to security issues due to improper handling of integer operations within WebAssembly execution. Mozilla fixed this vulnerability in Firefox 153 and Firefox ESR 140.13 as part of a security update addressing multiple high-impact bugs. The advisory does not detail exploitation methods or specific impacts beyond the high severity classification.
Potential Impact
The integer overflow in the WebAssembly component could allow an attacker to cause unexpected behavior in Firefox, potentially leading to memory corruption or other security issues. The Mozilla advisory classifies the impact as high, indicating significant risk if exploited. However, no active exploitation in the wild has been reported at this time.
Mitigation Recommendations
This vulnerability is fixed in Firefox 153 and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. Since this is a client-side application vulnerability, applying the official Mozilla updates is the recommended and effective mitigation.
CVE-2026-16369: Vulnerability in Mozilla Firefox
Description
Integer overflow in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16369 describes an integer overflow vulnerability in the JavaScript: WebAssembly component of Firefox. This vulnerability could potentially lead to security issues due to improper handling of integer operations within WebAssembly execution. Mozilla fixed this vulnerability in Firefox 153 and Firefox ESR 140.13 as part of a security update addressing multiple high-impact bugs. The advisory does not detail exploitation methods or specific impacts beyond the high severity classification.
Potential Impact
The integer overflow in the WebAssembly component could allow an attacker to cause unexpected behavior in Firefox, potentially leading to memory corruption or other security issues. The Mozilla advisory classifies the impact as high, indicating significant risk if exploited. However, no active exploitation in the wild has been reported at this time.
Mitigation Recommendations
This vulnerability is fixed in Firefox 153 and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. Since this is a client-side application vulnerability, applying the official Mozilla updates is the recommended and effective mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-54w4-5mrc-hfp8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-16369"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5fd1591010f89cc21c9d31
Added to database: 07/21/2026, 20:06:49 UTC
Last enriched: 07/22/2026, 17:39:51 UTC
Last updated: 08/26/2026, 10:52:07 UTC
Views: 56
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