Description
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
Published: 2026-05-12
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4592-1 firefox-esr security update
Debian DLA Debian DLA DLA-4594-1 thunderbird security update
Debian DSA Debian DSA DSA-6283-1 firefox-esr security update
Debian DSA Debian DSA DSA-6288-1 thunderbird security update
History

Wed, 20 May 2026 00:15:00 +0000


Tue, 19 May 2026 17:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, and Firefox ESR 140.11. Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
References

Tue, 19 May 2026 13:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3. Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, and Firefox ESR 140.11.
References

Fri, 15 May 2026 20:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

Thu, 14 May 2026 23:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Thu, 14 May 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 14 May 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Tue, 12 May 2026 17:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Tue, 12 May 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 12 May 2026 15:00:00 +0000

Type Values Removed Values Added
Description Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3.
Title Sandbox escape in the Profile Backup component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-06-30T03:18:02.543Z

Reserved: 2026-05-12T14:19:41.837Z

Link: CVE-2026-8401

cve-icon Vulnrichment

Updated: 2026-06-30T03:18:02.543Z

cve-icon NVD

Status : Modified

Published: 2026-05-12T15:16:20.100

Modified: 2026-06-17T11:03:53.140

Link: CVE-2026-8401

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-12T14:24:33Z

Links: CVE-2026-8401 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-20T01:30:06Z

Weaknesses