Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox ESR 140.10.1.
https://www.mozilla.org/security/advisories/mfsa2026-36/
https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
Source: Mitre, NVD
Published: 2026-04-28
Updated: 2026-04-28
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 9.6
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H