CVE-2026-16368: Vulnerability in Mozilla Firefox
CVE-2026-16368 is a critical vulnerability in Mozilla Firefox involving incorrect boundary conditions in the JavaScript: WebAssembly component. This flaw could lead to severe impacts including full confidentiality, integrity, and availability compromise. The vulnerability affects Firefox versions prior to 153 and Firefox ESR versions prior to 140.13. Mozilla has released official fixes in Firefox 153 and Firefox ESR 140.13. There are no known exploits in the wild at this time. The CVSS v3.1 score is 9.8, indicating a critical severity level.
AI Analysis
Technical Summary
CVE-2026-16368 is a security vulnerability in Mozilla Firefox's JavaScript: WebAssembly component caused by incorrect boundary conditions. This vulnerability was addressed and fixed in Firefox 153 and Firefox ESR 140.13. The CVSS 3.1 base score of 9.8 reflects its critical nature, with network attack vector, low attack complexity, no privileges or user interaction required, and full impact on confidentiality, integrity, and availability. The Mozilla advisory confirms the fix and categorizes the impact as high. No known active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service, resulting in complete compromise of confidentiality, integrity, and availability of the affected system. The CVSS score of 9.8 underscores the critical impact. However, no known exploits in the wild have been reported so far.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 153 and Firefox ESR 140.13. Users and administrators should update affected Firefox installations to these versions or later to remediate the vulnerability. Since this is not a cloud service, manual patching is required. No additional mitigation steps are specified by the vendor advisory.
CVE-2026-16368: Vulnerability in Mozilla Firefox
Description
CVE-2026-16368 is a critical vulnerability in Mozilla Firefox involving incorrect boundary conditions in the JavaScript: WebAssembly component. This flaw could lead to severe impacts including full confidentiality, integrity, and availability compromise. The vulnerability affects Firefox versions prior to 153 and Firefox ESR versions prior to 140.13. Mozilla has released official fixes in Firefox 153 and Firefox ESR 140.13. There are no known exploits in the wild at this time. The CVSS v3.1 score is 9.8, indicating a critical severity level.
CVSS v3.1
Score 9.8critical
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16368 is a security vulnerability in Mozilla Firefox's JavaScript: WebAssembly component caused by incorrect boundary conditions. This vulnerability was addressed and fixed in Firefox 153 and Firefox ESR 140.13. The CVSS 3.1 base score of 9.8 reflects its critical nature, with network attack vector, low attack complexity, no privileges or user interaction required, and full impact on confidentiality, integrity, and availability. The Mozilla advisory confirms the fix and categorizes the impact as high. No known active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service, resulting in complete compromise of confidentiality, integrity, and availability of the affected system. The CVSS score of 9.8 underscores the critical impact. However, no known exploits in the wild have been reported so far.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 153 and Firefox ESR 140.13. Users and administrators should update affected Firefox installations to these versions or later to remediate the vulnerability. Since this is not a cloud service, manual patching is required. No additional mitigation steps are specified by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:56:23.990Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbb2a4a8d5989262522
Added to database: 07/21/2026, 12:57:31 UTC
Last enriched: 07/30/2026, 10:53:28 UTC
Last updated: 09/03/2026, 03:17:43 UTC
Views: 98
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