CVE-2026-2760: Vulnerability in Mozilla Firefox
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
AI Analysis
Technical Summary
CVE-2026-2760 is a critical security vulnerability in Mozilla Firefox's Graphics: WebRender component, where incorrect boundary conditions enable sandbox escape. This vulnerability allows an attacker to break out of the sandbox environment, potentially leading to arbitrary code execution with high impact on confidentiality, integrity, and availability. The issue was reported by Oskar L and fixed in Firefox 148 and Firefox ESR 115.33, among other versions. The vendor advisory confirms the fix and classifies the impact as high.
Potential Impact
Successful exploitation of this vulnerability results in sandbox escape, which can lead to full compromise of the affected system's security properties including confidentiality, integrity, and availability. The CVSS v3.1 base score of 10.0 reflects the critical nature of this vulnerability with network attack vector, no required privileges, and no user interaction needed.
Mitigation Recommendations
This vulnerability is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation is required once the update is applied.
CVE-2026-2760: Vulnerability in Mozilla Firefox
Description
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
CVSS v3.1
Score 10.0critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-2760 is a critical security vulnerability in Mozilla Firefox's Graphics: WebRender component, where incorrect boundary conditions enable sandbox escape. This vulnerability allows an attacker to break out of the sandbox environment, potentially leading to arbitrary code execution with high impact on confidentiality, integrity, and availability. The issue was reported by Oskar L and fixed in Firefox 148 and Firefox ESR 115.33, among other versions. The vendor advisory confirms the fix and classifies the impact as high.
Potential Impact
Successful exploitation of this vulnerability results in sandbox escape, which can lead to full compromise of the affected system's security properties including confidentiality, integrity, and availability. The CVSS v3.1 base score of 10.0 reflects the critical nature of this vulnerability with network attack vector, no required privileges, and no user interaction needed.
Mitigation Recommendations
This vulnerability is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation is required once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-02-19T15:05:23.107Z
- Cvss Version
- null
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-13/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-14/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-15/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-16/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-17/","vendor":"Mozilla"},{"url":"https://access.redhat.com/security/cve/CVE-2026-2760","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3984","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3976","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:4260","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3361","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3517","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3338","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3515","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3492","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:4432","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3491","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3980","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3495","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3979","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3494","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:4022","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3493","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3983","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:4152","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3978","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3496","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3981","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3497","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3982","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3339","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:3516","vendor":"Red Hat"}]
Threat ID: 699daf6bbe58cf853bdddd7e
Added to database: 02/24/2026, 14:02:19 UTC
Last enriched: 07/15/2026, 08:50:43 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 285
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