CVE-2026-16410: Vulnerability in Mozilla Firefox
CVE-2026-16410 is a critical vulnerability in Mozilla Firefox's JavaScript Engine related to JIT miscompilation. This flaw was fixed in Firefox version 153. The vulnerability allows for potential high impact on confidentiality, integrity, and availability. It is part of a broader set of security fixes released in Firefox 153 and Thunderbird 153. No known exploits in the wild have been reported. Users running Firefox versions prior to 153 are affected and should update to the fixed version.
AI Analysis
Technical Summary
CVE-2026-16410 describes a Just-In-Time (JIT) miscompilation vulnerability in the JavaScript Engine's JIT component of Mozilla Firefox. This vulnerability could lead to severe impacts on confidentiality, integrity, and availability, as indicated by its CVSS 3.1 score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The issue was resolved in Firefox 153 and Thunderbird 153 as part of a comprehensive security update addressing multiple high-impact vulnerabilities. The vendor advisory confirms the fix and recommends upgrading to version 153 or later. There are no reports of active exploitation in the wild at this time.
Potential Impact
The vulnerability allows an attacker to potentially execute arbitrary code or cause significant disruption by exploiting the JIT miscompilation flaw, impacting confidentiality, integrity, and availability of the affected system. Given the critical CVSS score, successful exploitation could lead to full compromise of the Firefox process. However, no known exploits have been observed in the wild.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153 and Thunderbird 153. Users and administrators should upgrade affected Firefox installations to version 153 or later to remediate this issue. Since this is not a cloud service, manual patching is required. No additional mitigations are specified by the vendor advisory.
CVE-2026-16410: Vulnerability in Mozilla Firefox
Description
CVE-2026-16410 is a critical vulnerability in Mozilla Firefox's JavaScript Engine related to JIT miscompilation. This flaw was fixed in Firefox version 153. The vulnerability allows for potential high impact on confidentiality, integrity, and availability. It is part of a broader set of security fixes released in Firefox 153 and Thunderbird 153. No known exploits in the wild have been reported. Users running Firefox versions prior to 153 are affected and should update to the fixed version.
CVSS v3.1
Score 9.8critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16410 describes a Just-In-Time (JIT) miscompilation vulnerability in the JavaScript Engine's JIT component of Mozilla Firefox. This vulnerability could lead to severe impacts on confidentiality, integrity, and availability, as indicated by its CVSS 3.1 score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The issue was resolved in Firefox 153 and Thunderbird 153 as part of a comprehensive security update addressing multiple high-impact vulnerabilities. The vendor advisory confirms the fix and recommends upgrading to version 153 or later. There are no reports of active exploitation in the wild at this time.
Potential Impact
The vulnerability allows an attacker to potentially execute arbitrary code or cause significant disruption by exploiting the JIT miscompilation flaw, impacting confidentiality, integrity, and availability of the affected system. Given the critical CVSS score, successful exploitation could lead to full compromise of the Firefox process. However, no known exploits have been observed in the wild.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153 and Thunderbird 153. Users and administrators should upgrade affected Firefox installations to version 153 or later to remediate this issue. Since this is not a cloud service, manual patching is required. No additional mitigations are specified by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:57:51.809Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cc42a4a8d5989262a0c
Added to database: 07/21/2026, 12:57:40 UTC
Last enriched: 07/30/2026, 09:52:15 UTC
Last updated: 08/29/2026, 22:52:09 UTC
Views: 92
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