Description
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Published: 2026-10-13
Score: n/a
EPSS: < 1% Very Low
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
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

Mon, 19 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

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


Sat, 17 Oct 2026 08:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-188
CWE-787

Wed, 14 Oct 2026 01:00:00 +0000

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

Tue, 13 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
CWE-215

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

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

Tue, 13 Oct 2026 16:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-122
CWE-215

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

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

Subscriptions

Mozilla Firefox Thunderbird
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-10-19T11:07:12.043Z

Reserved: 2026-10-13T00:29:28.830Z

Link: CVE-2026-109721

cve-icon Vulnrichment

Updated: 2026-10-19T11:06:51.606Z

cve-icon NVD

Status : Deferred

Published: 2026-10-13T13:17:22.590

Modified: 2026-10-19T12:16:57.070

Link: CVE-2026-109721

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T07:45:05Z

Weaknesses