CVE-2026-100792: Vulnerability in Mozilla Firefox
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
AI Analysis
Technical Summary
This vulnerability concerns a JIT miscompilation bug in the JavaScript WebAssembly component of Mozilla Firefox. Such miscompilation could lead to incorrect code execution or memory corruption. Mozilla fixed this issue in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The vendor advisory lists this as a high-impact issue and confirms the fix in these versions. No known exploits in the wild have been reported.
Potential Impact
The vulnerability has a high impact rating as per Mozilla's advisory. It affects the WebAssembly component's JIT compiler, which could lead to incorrect code execution or memory safety issues. Exploitation could potentially compromise browser security or stability. However, no active exploitation has been reported.
Mitigation Recommendations
Users and administrators should update Firefox to ESR 153.4, Firefox 157, or later versions where this vulnerability is fixed. Applying these official updates fully mitigates the issue. No additional mitigations are required beyond applying the vendor-provided patches.
CVE-2026-100792: Vulnerability in Mozilla Firefox
Description
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Affected software
Mozilla
Firefox
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns a JIT miscompilation bug in the JavaScript WebAssembly component of Mozilla Firefox. Such miscompilation could lead to incorrect code execution or memory corruption. Mozilla fixed this issue in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The vendor advisory lists this as a high-impact issue and confirms the fix in these versions. No known exploits in the wild have been reported.
Potential Impact
The vulnerability has a high impact rating as per Mozilla's advisory. It affects the WebAssembly component's JIT compiler, which could lead to incorrect code execution or memory safety issues. Exploitation could potentially compromise browser security or stability. However, no active exploitation has been reported.
Mitigation Recommendations
Users and administrators should update Firefox to ESR 153.4, Firefox 157, or later versions where this vulnerability is fixed. Applying these official updates fully mitigates the issue. No additional mitigations are required beyond applying the vendor-provided patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:17:23.406Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","vendor":"Mozilla"}]
Threat ID: 6abbb3f1f7a7c54106640990
Added to database: 09/29/2026, 12:49:53 UTC
Last enriched: 09/29/2026, 13:18:29 UTC
Last updated: 09/29/2026, 18:20:13 UTC
Views: 2
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