Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
153.7 unaffected ≤ 153.*
160 unaffected ≤ *
Mozilla Thunderbird affected
Version Status Constraints
160 unaffected ≤ *

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2058648 cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-125/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-127/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-128/ cve-icon cve-icon
History

Tue, 10 Nov 2026 19:15:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7. Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160.
References

Tue, 10 Nov 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

Tue, 10 Nov 2026 13:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
Title Sandbox escape due to use-after-free in the Widget: Gtk component
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-11-10T18:58:59.229Z

Reserved: 2026-11-09T14:47:24.330Z

Link: CVE-2026-124917

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-10T14:17:25.483

Modified: 2026-11-10T19:21:01.630

Link: CVE-2026-124917

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.