CVE-2026-100788: Vulnerability in Mozilla Firefox
Invalid pointer 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 an invalid pointer in the JavaScript WebAssembly component of Mozilla Firefox. It was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The Mozilla advisory lists this issue among several high-impact memory safety vulnerabilities resolved in the same update cycle. No exploit in the wild is currently known for this specific CVE.
Potential Impact
The vulnerability has a high impact rating according to the vendor advisory. It involves memory safety issues that could potentially lead to crashes or other unintended behavior in Firefox's JavaScript WebAssembly engine. However, no active exploitation has been reported.
Mitigation Recommendations
A fix is available and has been incorporated in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users and administrators should update to these versions or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-100788: Vulnerability in Mozilla Firefox
Description
Invalid pointer 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 an invalid pointer in the JavaScript WebAssembly component of Mozilla Firefox. It was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The Mozilla advisory lists this issue among several high-impact memory safety vulnerabilities resolved in the same update cycle. No exploit in the wild is currently known for this specific CVE.
Potential Impact
The vulnerability has a high impact rating according to the vendor advisory. It involves memory safety issues that could potentially lead to crashes or other unintended behavior in Firefox's JavaScript WebAssembly engine. However, no active exploitation has been reported.
Mitigation Recommendations
A fix is available and has been incorporated in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users and administrators should update to these versions or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:17:13.330Z
- 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: 6abbb3f1f7a7c5410664098c
Added to database: 09/29/2026, 12:49:53 UTC
Last enriched: 09/29/2026, 13:18:44 UTC
Last updated: 09/29/2026, 18:20:13 UTC
Views: 3
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