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CVE-2026-109723 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Integer overflow in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CNA: CISA-ADPCVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2074171	[email protected]	Issue TrackingPermission RequiredVendor
https://www.mozilla.org/security/advisories/mfsa2026-106/	[email protected]	AdvisoryBundleVendor
https://www.mozilla.org/security/advisories/mfsa2026-108/	[email protected]	AdvisoryBundleVendor
https://www.mozilla.org/security/advisories/mfsa2026-109/	[email protected]
https://www.mozilla.org/security/advisories/mfsa2026-110/	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	CISA-ADP

Affected Products

Product	Versions
Mozilla Firefox	All versions
CPE cpe:2.3:a:mozilla:firefox:::::::: Remediation Upgrade: 158moderate effort
Mozilla Firefox ESR	All versions
CPE cpe:2.3:a:mozilla:firefox_esr:::::::: Remediation Upgrade: 153.5moderate effort

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 15, 2026	CVE Modified	CISA-ADP
Oct 13, 2026	CVE Modified	[email protected]
Oct 13, 2026	New CVE Received	[email protected]