CVE-2026-12295

CRITICAL 9.6EPSS 0.4%

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

CVSS v3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v3.1: 9.6 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS: 0.39% chance of exploitation in the next 30 days, 32th percentile
Published: 2026-06-16
Updated: 2026-07-15

Proof-of-concept exploits (1)

SneakyNachos/CVE-2026-12295-UXXS-in-my-wasm1★ · 2026-08-25

References

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