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CVE-2022-1802

Mozilla: Prototype pollution in Top-Level Await implementation

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Severity

Critical

Red Hat Product Security

8.8

CVSS 3.0

Review impact separately from score.

Published · May 20, 2022

Updated · November 21, 2025

Description

The Mozilla Foundation Security Advisory describes this flaw as: If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')