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VULNERABILITIES

CVE-2026-109757 Details

ANALYZED

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

Description

Sandbox escape due to race condition in the Networking 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:

NDDVolerionCVSS-B:9 CRITICALVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
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=2069910 [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-IDCWE NameSource
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CISA-ADP

Affected Products

ProductVersions
Mozilla Firefox
All versions

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: 158moderate effort
  • Upgrade: 153.5moderate effort

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-109757
NVD Published Date:
Oct 13, 2026
NVD Last Modified:
Oct 15, 2026
Source:
[email protected]
CVE-2026-109757 Details - Not Deferred