CVE-2026-124897

Use-after-free in the JavaScript: GC component

Published Nov 10, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4896-1 firefox-esr security update
Debian DLA Debian DLA DLA-4898-1 thunderbird security update
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160. Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
References
Type Values Removed Values Added
Description Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7. Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160.
References
Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Description Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
Title Use-after-free in the JavaScript: GC component
References

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Nov 10, 2026, 8:24 PM
Reserved
Nov 9, 2026, 2:46 PM
Status
Deferred
Published
Nov 10, 2026, 2:17 PM
Modified
Nov 10, 2026, 9:19 PM
Severity
Important
Public date
Nov 10, 2026, 1:28 PM