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VULNERABILITIES

CVE-2026-92048 Details

Description

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:9 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2061235 [email protected]Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-90/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-93/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-94/ [email protected]Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-96/ [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferCISA-ADP

Affected Products

ProductVersions
mozilla firefox
< 153.3.0
>= 154.0.0, < 156.0.0

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
mozilla thunderbird
< 153.3.0
>= 154.0, < 156.0

CPE

  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-92048
NVD Published Date:
Sep 15, 2026
NVD Last Modified:
Oct 5, 2026
Source:
[email protected]
CVE-2026-92048 Details - Not Deferred