CVE-2026-12311

MEDIUM

Information disclosure, sandbox escape in the Security: Process Sandboxing component

Title source: cna
STIX 2.1

Description

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

References (5)

Core 5

Scores

CVSS v3 4.7
EPSS 0.0019
EPSS Percentile 8.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-200 CWE-688
Status published
Products (8)
mozilla/firefox < 152.0
mozilla/firefox 140.0 - 140.12.0
Mozilla/Firefox 140.12 - 140.*
Mozilla/Firefox 152
mozilla/thunderbird < 152.0.0
mozilla/thunderbird 140.0 - 140.12.0
Mozilla/Thunderbird 140.12 - 140.*
Mozilla/Thunderbird 152
Published Jun 16, 2026
Tracked Since Jun 16, 2026