CVE-2026-6759

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2016164	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-30/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-32/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-33/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-34/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox:::::esr:::*
	cpe:2.3:a:mozilla:firefox:::::-:::*
	cpe:2.3:a:mozilla:thunderbird:::::esr:::*

History

26 Oct 2026, 00:10

Type	Values Removed	Values Added
Summary		(es) Uso después de liberación en el componente Widget: Cocoa. Esta vulnerabilidad se corrigió en Firefox 150, Firefox ESR 140.10, Thunderbird 150 y Thunderbird 140.10.

Information

Published : 2026-04-21 13:16

Updated : 2026-10-26 00:10

NVD link : CVE-2026-6759

Mitre link : CVE-2026-6759

CVE.ORG link : CVE-2026-6759

JSON object : View

Products Affected

mozilla

firefox
thunderbird

CWE

CWE-416

Use After Free

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