CVE-2026-100796: Vulnerability in Mozilla Firefox
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 157.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the JavaScript: WebAssembly component of Mozilla Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption. Mozilla fixed this vulnerability in Firefox 157 as part of a large batch of memory safety fixes. The vendor advisory lists this vulnerability with moderate impact and references Bug 2049604 for technical details.
Potential Impact
The vulnerability could allow an attacker to cause memory corruption, potentially leading to crashes or other unintended behavior. Mozilla rates the impact as moderate for this specific vulnerability. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox 157. Users and administrators should update to Firefox 157 or later to remediate this issue. Since this is not a cloud service, patching the client software is required. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-100796: Vulnerability in Mozilla Firefox
Description
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 157.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the JavaScript: WebAssembly component of Mozilla Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption. Mozilla fixed this vulnerability in Firefox 157 as part of a large batch of memory safety fixes. The vendor advisory lists this vulnerability with moderate impact and references Bug 2049604 for technical details.
Potential Impact
The vulnerability could allow an attacker to cause memory corruption, potentially leading to crashes or other unintended behavior. Mozilla rates the impact as moderate for this specific vulnerability. There are no known exploits in the wild at the time of publication.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox 157. Users and administrators should update to Firefox 157 or later to remediate this issue. Since this is not a cloud service, patching the client software is required. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:17:33.309Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"}]
Threat ID: 6abbb3f3f7a7c5410664099c
Added to database: 09/29/2026, 12:49:55 UTC
Last enriched: 09/29/2026, 13:18:17 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 7
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