CVE-2026-100775: Vulnerability in Mozilla Firefox
Sandbox escape in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
AI Analysis
Technical Summary
CVE-2026-100775 is a sandbox escape vulnerability located in the Graphics component of Mozilla Firefox. The flaw could allow an attacker to bypass sandbox restrictions, potentially leading to execution of code outside the intended sandbox environment. Mozilla addressed this vulnerability by releasing patches in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. The vendor advisory lists this vulnerability among multiple high-impact security fixes released simultaneously.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox environment, undermining the browser's security containment and potentially leading to arbitrary code execution or system compromise. The impact is rated high by the vendor.
Mitigation Recommendations
A fix is available and users should update to Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, or Firefox ESR 140.17 or later. Applying these official patches fully mitigates the vulnerability.
CVE-2026-100775: Vulnerability in Mozilla Firefox
Description
Sandbox escape in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Affected software
Mozilla
Firefox
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-2026-100775 is a sandbox escape vulnerability located in the Graphics component of Mozilla Firefox. The flaw could allow an attacker to bypass sandbox restrictions, potentially leading to execution of code outside the intended sandbox environment. Mozilla addressed this vulnerability by releasing patches in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. The vendor advisory lists this vulnerability among multiple high-impact security fixes released simultaneously.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox environment, undermining the browser's security containment and potentially leading to arbitrary code execution or system compromise. The impact is rated high by the vendor.
Mitigation Recommendations
A fix is available and users should update to Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, or Firefox ESR 140.17 or later. Applying these official patches fully mitigates the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:15:31.053Z
- 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/mfsa2026-98/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","vendor":"Mozilla"}]
Threat ID: 6abbb3edf7a7c54106640973
Added to database: 09/29/2026, 12:49:49 UTC
Last enriched: 09/29/2026, 13:33:03 UTC
Last updated: 09/29/2026, 18:20:13 UTC
Views: 3
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