mozilla firefox CVE-2026-92050 vulnerability in Mozilla Products
Published on September 15, 2026

Sandbox escape due to race condition in the XPConnect component

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Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.

NVD

Vulnerability Analysis

CVE-2026-92050 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Race Condition Vulnerability?

The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

CVE-2026-92050 has been classified to as a Race Condition vulnerability or weakness.


Products Associated with CVE-2026-92050

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Affected Versions

Mozilla Firefox: Mozilla Thunderbird: