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VULNERABILITIES

CVE-2026-109782 Details

ANALYZED

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

Description

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox ESR 153.5 and Thunderbird 153.5.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA: CISA-ADPCVSS-B:8.3 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=2067465 [email protected]Issue TrackingPermission RequiredVendor
https://www.mozilla.org/security/advisories/mfsa2026-108/ [email protected]AdvisoryBundleRemedyVendor
https://www.mozilla.org/security/advisories/mfsa2026-110/ [email protected]AdvisoryBundleRemedyVendor

Weakness Enumeration

CWE-IDCWE NameSource
CWE-693Protection Mechanism FailureCISA-ADP

Affected Products

ProductVersions
Mozilla Firefox ESR
All versions

CPE

  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: 153.5moderate effort
Mozilla Thunderbird
All versions

CPE

  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: 153.5moderate effort

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-109782
NVD Published Date:
Oct 13, 2026
NVD Last Modified:
Oct 26, 2026
Source:
[email protected]
CVE-2026-109782 Details - Not Deferred