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CVE-2026-4687

Sandbox escape due to incorrect boundary conditions in the Telemetry component

CVSS 9.6 CRITICALEPSS 0.4%CWE-120
Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Produtos afetados
Mozilla · FirefoxMozilla · Thunderbird

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Referências
https://bugzilla.mozilla.org/show_bug.cgi?id=2016368https://www.mozilla.org/security/advisories/mfsa2026-20/https://www.mozilla.org/security/advisories/mfsa2026-21/https://www.mozilla.org/security/advisories/mfsa2026-22/https://www.mozilla.org/security/advisories/mfsa2026-23/https://www.mozilla.org/security/advisories/mfsa2026-24/