CVE-2026-8401: Vulnerability in Mozilla Firefox
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-8401) affects the Profile Backup component of Mozilla Firefox and enables a sandbox escape. The sandbox is a security mechanism that restricts the execution environment of browser components to prevent malicious code from affecting the host system. The escape from this sandbox could allow an attacker to execute code outside the intended restricted environment. Mozilla fixed this issue in Firefox 150.0.3, as documented in their security advisory MFSA 2026-45.
Potential Impact
The impact of this vulnerability is classified as high by Mozilla. A successful exploit could allow an attacker to bypass sandbox restrictions, potentially leading to execution of arbitrary code with greater privileges than normally permitted within the browser sandbox. This could compromise user security and system integrity.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 150.0.3. Users and administrators should update to Firefox 150.0.3 or later to remediate this issue. No additional mitigation actions are indicated by the vendor advisory.
CVE-2026-8401: Vulnerability in Mozilla Firefox
Description
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-8401) affects the Profile Backup component of Mozilla Firefox and enables a sandbox escape. The sandbox is a security mechanism that restricts the execution environment of browser components to prevent malicious code from affecting the host system. The escape from this sandbox could allow an attacker to execute code outside the intended restricted environment. Mozilla fixed this issue in Firefox 150.0.3, as documented in their security advisory MFSA 2026-45.
Potential Impact
The impact of this vulnerability is classified as high by Mozilla. A successful exploit could allow an attacker to bypass sandbox restrictions, potentially leading to execution of arbitrary code with greater privileges than normally permitted within the browser sandbox. This could compromise user security and system integrity.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 150.0.3. Users and administrators should update to Firefox 150.0.3 or later to remediate this issue. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-12T14:19:41.837Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-45/","vendor":"Mozilla"}]
Threat ID: 6a0341f7cbff5d8610f900e3
Added to database: 5/12/2026, 3:06:31 PM
Last enriched: 5/12/2026, 3:22:19 PM
Last updated: 5/12/2026, 7:44:16 PM
Views: 8
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