Description
Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Published: 2026-09-29
Score: 9.6 Critical
EPSS: n/a
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

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History

Tue, 29 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
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'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 29 Sep 2026 13:15:00 +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 ESR 153.4, Firefox 157, and Firefox ESR 140.17.
Title Sandbox escape due to use-after-free in the Widget: Gtk component
References

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-09-29T13:13:29.094Z

Reserved: 2026-09-26T19:18:28.415Z

Link: CVE-2026-100818

cve-icon Vulnrichment

Updated: 2026-09-29T13:11:14.764Z

cve-icon NVD

Status : Received

Published: 2026-09-29T13:17:47.037

Modified: 2026-09-29T14:17:17.550

Link: CVE-2026-100818

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-29T15:00:10Z

Weaknesses