CVE-2026-16367: Vulnerability in Mozilla Firefox
CVE-2026-16367 is a critical vulnerability in Mozilla Firefox involving a sandbox escape caused by an invalid pointer in the Disability Access APIs component. This flaw allows an attacker to potentially break out of the browser's sandbox environment, leading to full system compromise. The vulnerability was fixed in Firefox version 153. It has a CVSS 3.1 base score of 10.0, indicating critical severity with network attack vector, no required privileges or user interaction, and complete confidentiality, integrity, and availability impact.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-16367) in Mozilla Firefox is due to an invalid pointer handling in the Disability Access APIs component, which enables sandbox escape. The sandbox escape vulnerability allows malicious code running within the browser to break out of the restricted sandbox environment, potentially gaining higher privileges on the host system. The issue was reported by Oskar L and fixed in Firefox 153. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) reflects a critical remote code execution scenario with full system impact. The vendor advisory confirms the fix in Firefox 153 and Thunderbird 153. No known exploits in the wild have been reported at this time.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the Firefox sandbox, leading to arbitrary code execution with elevated privileges on the affected system. This compromises confidentiality, integrity, and availability of the system. The vulnerability is remotely exploitable without user interaction or privileges, making it highly severe.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153 and Thunderbird 153. Users and administrators should update affected products to version 153 or later to remediate this issue. There are no indications that the vulnerability can be exploited through Thunderbird email contexts due to scripting restrictions. No additional mitigations are specified beyond applying the official update.
CVE-2026-16367: Vulnerability in Mozilla Firefox
Description
CVE-2026-16367 is a critical vulnerability in Mozilla Firefox involving a sandbox escape caused by an invalid pointer in the Disability Access APIs component. This flaw allows an attacker to potentially break out of the browser's sandbox environment, leading to full system compromise. The vulnerability was fixed in Firefox version 153. It has a CVSS 3.1 base score of 10.0, indicating critical severity with network attack vector, no required privileges or user interaction, and complete confidentiality, integrity, and availability impact.
CVSS v3.1
Score 10.0critical
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-16367) in Mozilla Firefox is due to an invalid pointer handling in the Disability Access APIs component, which enables sandbox escape. The sandbox escape vulnerability allows malicious code running within the browser to break out of the restricted sandbox environment, potentially gaining higher privileges on the host system. The issue was reported by Oskar L and fixed in Firefox 153. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) reflects a critical remote code execution scenario with full system impact. The vendor advisory confirms the fix in Firefox 153 and Thunderbird 153. No known exploits in the wild have been reported at this time.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the Firefox sandbox, leading to arbitrary code execution with elevated privileges on the affected system. This compromises confidentiality, integrity, and availability of the system. The vulnerability is remotely exploitable without user interaction or privileges, making it highly severe.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153 and Thunderbird 153. Users and administrators should update affected products to version 153 or later to remediate this issue. There are no indications that the vulnerability can be exploited through Thunderbird email contexts due to scripting restrictions. No additional mitigations are specified beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:56:21.516Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbb2a4a8d598926251e
Added to database: 07/21/2026, 12:57:31 UTC
Last enriched: 07/30/2026, 10:53:48 UTC
Last updated: 08/30/2026, 22:52:08 UTC
Views: 96
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