Use-after-free in the JavaScript: WebAssembly component. (CVE-2026-92040)
A use-after-free vulnerability was identified in the JavaScript WebAssembly component of Firefox. This security flaw was addressed and fixed in Firefox version 156. The vulnerability is rated with high impact due to its potential severity, but no active exploits have been reported. Users are advised to update to Firefox 156 to mitigate this issue.
AI Analysis
Technical Summary
CVE-2026-92040 is a use-after-free vulnerability affecting the JavaScript WebAssembly component in Firefox. This type of vulnerability involves the use of memory after it has been freed, which can lead to undefined behavior and potential security risks. Mozilla fixed this vulnerability in Firefox 156 as part of a broader security update addressing multiple high-impact issues.
Potential Impact
The vulnerability has a high impact rating as per Mozilla's advisory, indicating that successful exploitation could lead to significant security consequences. However, there are no known exploits in the wild at this time. The flaw could potentially allow attackers to execute arbitrary code or cause a denial of service if exploited.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 156. Users and administrators should update to Firefox 156 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Use-after-free in the JavaScript: WebAssembly component. (CVE-2026-92040)
Description
A use-after-free vulnerability was identified in the JavaScript WebAssembly component of Firefox. This security flaw was addressed and fixed in Firefox version 156. The vulnerability is rated with high impact due to its potential severity, but no active exploits have been reported. Users are advised to update to Firefox 156 to mitigate this issue.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92040 is a use-after-free vulnerability affecting the JavaScript WebAssembly component in Firefox. This type of vulnerability involves the use of memory after it has been freed, which can lead to undefined behavior and potential security risks. Mozilla fixed this vulnerability in Firefox 156 as part of a broader security update addressing multiple high-impact issues.
Potential Impact
The vulnerability has a high impact rating as per Mozilla's advisory, indicating that successful exploitation could lead to significant security consequences. However, there are no known exploits in the wild at this time. The flaw could potentially allow attackers to execute arbitrary code or cause a denial of service if exploited.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 156. Users and administrators should update to Firefox 156 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-ghm9-chqr-fv8j
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-92040"]
- State
- PUBLISHED
Threat ID: 6aaa081155bf5e2cf5ea483c
Added to database: 09/16/2026, 03:08:01 UTC
Last enriched: 09/16/2026, 05:06:50 UTC
Last updated: 09/16/2026, 05:21:30 UTC
Views: 4
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