CVE-2026-92071: Vulnerability in Mozilla Firefox
CVE-2026-92071 is a sandbox escape vulnerability in Mozilla Firefox caused by incorrect boundary conditions in the Widget: Win32 component. This security flaw allows potential privilege escalation by escaping the browser's sandbox environment. The vulnerability was fixed in Firefox version 156 and Firefox ESR 153.3.
AI Analysis
Technical Summary
This vulnerability involves incorrect boundary conditions in the Widget: Win32 component of Mozilla Firefox, which can lead to sandbox escape. The sandbox is a security mechanism designed to isolate processes and limit the impact of exploits. By escaping the sandbox, an attacker could potentially gain elevated privileges or execute code outside the intended restricted environment. Mozilla addressed this issue by releasing a fix in Firefox 156 and Firefox ESR 153.3.
Potential Impact
The vulnerability enables sandbox escape, which can lead to privilege escalation and compromise of the browser's security boundaries. This increases the risk of attackers executing arbitrary code with higher privileges than intended, potentially affecting the confidentiality and integrity of the user's system.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update affected Firefox installations to version 156 or later to remediate this issue. No additional mitigation is required once the update is applied.
CVE-2026-92071: Vulnerability in Mozilla Firefox
Description
CVE-2026-92071 is a sandbox escape vulnerability in Mozilla Firefox caused by incorrect boundary conditions in the Widget: Win32 component. This security flaw allows potential privilege escalation by escaping the browser's sandbox environment. The vulnerability was fixed in Firefox version 156 and Firefox ESR 153.3.
Affected software
Mozilla
Firefox
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves incorrect boundary conditions in the Widget: Win32 component of Mozilla Firefox, which can lead to sandbox escape. The sandbox is a security mechanism designed to isolate processes and limit the impact of exploits. By escaping the sandbox, an attacker could potentially gain elevated privileges or execute code outside the intended restricted environment. Mozilla addressed this issue by releasing a fix in Firefox 156 and Firefox ESR 153.3.
Potential Impact
The vulnerability enables sandbox escape, which can lead to privilege escalation and compromise of the browser's security boundaries. This increases the risk of attackers executing arbitrary code with higher privileges than intended, potentially affecting the confidentiality and integrity of the user's system.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update affected Firefox installations to version 156 or later to remediate this issue. No additional mitigation is required once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:34:32.533Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6955bf5e2cf5d3102c
Added to database: 09/15/2026, 12:47:37 UTC
Last enriched: 09/15/2026, 13:01:35 UTC
Last updated: 09/15/2026, 13:04:36 UTC
Views: 5
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