CVE-2026-100818Critical· 9.6▾ MidnightSandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 52.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-100797High· 8.8Privilege escalation due to use-after-free in the Graphics: WebRender component
CVE-2026-96869NoneInformation disclosure in the Networking component
CVE-2026-100832High· 8.8Use-after-free in the Graphics: Canvas2D component
CVE-2026-100831High· 8.8Use-after-free in the DOM: UI Events & Focus Handling component
CVE-2026-100825High· 8.8Use-after-free in the JavaScript Engine: JIT component
CVE-2026-100821NoneSite isolation issue in the Panning and Zooming component