CVE-2026-109757

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.

CVSS v3 8.3 HIGH

8.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2069910
https://www.mozilla.org/security/advisories/mfsa2026-106/
https://www.mozilla.org/security/advisories/mfsa2026-108/
https://www.mozilla.org/security/advisories/mfsa2026-109/
https://www.mozilla.org/security/advisories/mfsa2026-110/

Configurations

No configuration.

History

15 Oct 2026, 20:17

Type	Values Removed	Values Added
CWE		CWE-362
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.3

13 Oct 2026, 19:18

Type	Values Removed	Values Added
Summary	~~(en) Sandbox escape due to race condition in the Networking component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.~~	(en) 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.
References		() https://www.mozilla.org/security/advisories/mfsa2026-109/ - () https://www.mozilla.org/security/advisories/mfsa2026-110/ -

13 Oct 2026, 13:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-13 13:17

Updated : 2026-10-15 20:17

NVD link : CVE-2026-109757

Mitre link : CVE-2026-109757

CVE.ORG link : CVE-2026-109757

JSON object : View

Products Affected

No product.

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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