Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Published: 2026-10-13
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No solution or workaround provided in the CVE record.

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Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4836-1 firefox-esr security update
Debian DSA Debian DSA DSA-6560-1 firefox-esr security update
History

Thu, 15 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-843
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

ssvc

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


Tue, 13 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-665

Tue, 13 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
References

Tue, 13 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 13 Oct 2026 13:00:00 +0000

Type Values Removed Values Added
Description JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.
Title JIT miscompilation in the JavaScript Engine: JIT component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-10-15T19:23:33.700Z

Reserved: 2026-10-13T00:29:39.388Z

Link: CVE-2026-109733

cve-icon Vulnrichment

Updated: 2026-10-15T19:21:41.847Z

cve-icon NVD

Status : Deferred

Published: 2026-10-13T13:17:23.840

Modified: 2026-10-15T20:17:07.767

Link: CVE-2026-109733

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T20:45:19Z

Weaknesses