CVE-2026-100800: Vulnerability in Mozilla Firefox
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
AI Analysis
Technical Summary
This vulnerability is a use-after-free in the Disability Access APIs component of Mozilla Firefox, which can lead to sandbox escape. The flaw was addressed and fixed in Firefox ESR 153.4 and Firefox 157. The Mozilla advisory confirms the fix and classifies the impact as high. No known exploits in the wild have been reported.
Potential Impact
Successful exploitation could allow an attacker to escape the browser sandbox, potentially leading to execution of arbitrary code with elevated privileges within the context of the browser process. This represents a significant security risk due to the sandbox escape nature of the vulnerability.
Mitigation Recommendations
Users and administrators should update to Firefox ESR 153.4 or Firefox 157 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in these versions. No additional mitigation steps are required beyond applying the official update.
CVE-2026-100800: Vulnerability in Mozilla Firefox
Description
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
CVSS v3.1
Score 9.6critical
Affected software
Mozilla
Firefox
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a use-after-free in the Disability Access APIs component of Mozilla Firefox, which can lead to sandbox escape. The flaw was addressed and fixed in Firefox ESR 153.4 and Firefox 157. The Mozilla advisory confirms the fix and classifies the impact as high. No known exploits in the wild have been reported.
Potential Impact
Successful exploitation could allow an attacker to escape the browser sandbox, potentially leading to execution of arbitrary code with elevated privileges within the context of the browser process. This represents a significant security risk due to the sandbox escape nature of the vulnerability.
Mitigation Recommendations
Users and administrators should update to Firefox ESR 153.4 or Firefox 157 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in these versions. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:17:43.353Z
- 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"}]
Threat ID: 6abbb3f3f7a7c541066409a0
Added to database: 09/29/2026, 12:49:55 UTC
Last enriched: 09/29/2026, 13:18:03 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 7
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