CVE-2026-6757: Vulnerability in Mozilla Firefox
Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI Analysis
Technical Summary
This vulnerability concerns an invalid pointer usage within the JavaScript WebAssembly component of Mozilla Firefox. It was identified and reported by multiple researchers and fixed in Firefox 150 and Firefox ESR 140.10. The Mozilla advisories classify the impact as moderate. The issue is part of a broader set of memory safety and related bugs fixed in these Firefox versions.
Potential Impact
The vulnerability could potentially lead to memory corruption or instability within the WebAssembly execution environment of Firefox. Mozilla rates the impact as moderate, indicating that while it is a security concern, it is less severe than other high-impact vulnerabilities fixed in the same update. There are no reports of exploitation in the wild.
Mitigation Recommendations
Mozilla has provided an official fix for this vulnerability in Firefox 150 and Firefox ESR 140.10. Users and administrators should update to these or later versions to remediate the issue. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the update.
CVE-2026-6757: Vulnerability in Mozilla Firefox
Description
Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns an invalid pointer usage within the JavaScript WebAssembly component of Mozilla Firefox. It was identified and reported by multiple researchers and fixed in Firefox 150 and Firefox ESR 140.10. The Mozilla advisories classify the impact as moderate. The issue is part of a broader set of memory safety and related bugs fixed in these Firefox versions.
Potential Impact
The vulnerability could potentially lead to memory corruption or instability within the WebAssembly execution environment of Firefox. Mozilla rates the impact as moderate, indicating that while it is a security concern, it is less severe than other high-impact vulnerabilities fixed in the same update. There are no reports of exploitation in the wild.
Mitigation Recommendations
Mozilla has provided an official fix for this vulnerability in Firefox 150 and Firefox ESR 140.10. Users and administrators should update to these or later versions to remediate the issue. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:40:52.634Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-32/","vendor":"Mozilla"}]
Threat ID: 69e7789c19fe3cd2cdd163d1
Added to database: 4/21/2026, 1:16:12 PM
Last enriched: 4/21/2026, 1:46:28 PM
Last updated: 4/22/2026, 7:17:13 AM
Views: 6
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