2026 CVE Vulnerabilities

61,214 CVEs published in 2026.

CVE IDSeverityCVSSDescription
CVE-2026-12317HIGH7.5Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVE-2026-12316CRITICAL9.1Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVE-2026-12315CRITICAL9.1Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thund...
CVE-2026-12314HIGH7.5Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12313MEDIUM4.7Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Fi...
CVE-2026-12312HIGH7.5Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12311MEDIUM4.7Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Fi...
CVE-2026-12310HIGH7.5Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12309MEDIUM6.5Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12308MEDIUM5.3Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12307MEDIUM5.3Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12306MEDIUM5.3Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12305HIGH7.5Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12304CRITICAL9.1Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR...
CVE-2026-12303MEDIUM4.3Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fi...
CVE-2026-12302MEDIUM6.5Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firef...
CVE-2026-12301MEDIUM5.3Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVE-2026-12300MEDIUM5.3Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVE-2026-12299MEDIUM5.4JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, F...
CVE-2026-12298MEDIUM5.4Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152...
CVE-2026-12297CRITICAL9.6Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox...
CVE-2026-12296CRITICAL9.6Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 1...
CVE-2026-12295CRITICAL9.6Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefo...
CVE-2026-12294CRITICAL9.6Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox E...
CVE-2026-12293CRITICAL9.8Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

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