CVE-2026-16368: Vulnerability in Mozilla Firefox
Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
AI Analysis
Technical Summary
CVE-2026-16368 concerns incorrect boundary conditions in the JavaScript WebAssembly component of Mozilla Firefox. This vulnerability could potentially lead to security issues related to memory or execution boundaries within WebAssembly code. Mozilla fixed this vulnerability in Firefox 153 and Firefox ESR 140.13 as part of a security update addressing multiple high-impact vulnerabilities. The advisory notes the impact as high and references Bug 2051015 for technical details. No active exploitation is reported, but the fix is included in the official releases.
Potential Impact
The vulnerability has a high impact rating, indicating it could allow attackers to compromise the security of the Firefox browser through the WebAssembly component. Potential impacts include memory corruption or execution of unintended code paths due to incorrect boundary checks. However, there are no reports of active exploitation in the wild. The fix mitigates these risks by correcting the boundary condition errors.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 153 and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official patches.
CVE-2026-16368: Vulnerability in Mozilla Firefox
Description
Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153 and Firefox ESR 140.13.
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16368 concerns incorrect boundary conditions in the JavaScript WebAssembly component of Mozilla Firefox. This vulnerability could potentially lead to security issues related to memory or execution boundaries within WebAssembly code. Mozilla fixed this vulnerability in Firefox 153 and Firefox ESR 140.13 as part of a security update addressing multiple high-impact vulnerabilities. The advisory notes the impact as high and references Bug 2051015 for technical details. No active exploitation is reported, but the fix is included in the official releases.
Potential Impact
The vulnerability has a high impact rating, indicating it could allow attackers to compromise the security of the Firefox browser through the WebAssembly component. Potential impacts include memory corruption or execution of unintended code paths due to incorrect boundary checks. However, there are no reports of active exploitation in the wild. The fix mitigates these risks by correcting the boundary condition errors.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 153 and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:56:23.990Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbb2a4a8d5989262522
Added to database: 07/21/2026, 12:57:31 UTC
Last enriched: 07/21/2026, 13:41:51 UTC
Last updated: 07/21/2026, 21:18:45 UTC
Views: 4
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