Sandbox escape in the Security: Process Sandboxing component_CVE-2026-12296

9.6 / 10

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Description

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.

Basic Information

ID CVE-2026-12296

Source mozilla

Published Jun 16, 2026 at 11:52

Modified Jun 18, 2026 at 16:11

Affected Product

Vendor Mozilla

Product Firefox

Version 140.12

CWE Classification

CWE-693

References

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    "lastseen": "",
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    "published": "2026-06-16T11:52:29.869Z",
    "modified": "2026-06-18T16:11:00.665Z",
    "type": "cve",
    "title": "Sandbox escape in the Security: Process Sandboxing component",
    "source": "mozilla",
    "references": "https://bugzilla.mozilla.org/show_bug.cgi?id=2040515\nhttps://www.mozilla.org/security/advisories/mfsa2026-57/\nhttps://www.mozilla.org/security/advisories/mfsa2026-58/\nhttps://www.mozilla.org/security/advisories/mfsa2026-60/\nhttps://www.mozilla.org/security/advisories/mfsa2026-61/",
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