CVE-2026-12313

MEDIUM

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

Title source: cna

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

Core References

https://bugzilla.mozilla.org/show_bug.cgi?id=2040477

https://www.mozilla.org/security/advisories/mfsa2026-57/

https://www.mozilla.org/security/advisories/mfsa2026-58/

https://www.mozilla.org/security/advisories/mfsa2026-60/

https://www.mozilla.org/security/advisories/mfsa2026-61/

Scores

CVSS v3 4.7

EPSS 0.0018

EPSS Percentile 7.2%

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-269

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