Improperly Controlled Modification of Dynamically-Determined Object Attributes Affecting @nyariv/sandboxjs package, versions <0.8.36
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-NYARIVSANDBOXJS-15909755
- published5 Apr 2026
- disclosed3 Apr 2026
- creditfancymalware
Introduced: 3 Apr 2026
NewCVE-2026-34208 (opens in a new tab)How to fix?
Upgrade @nyariv/sandboxjs to version 0.8.36 or higher.
Overview
@nyariv/sandboxjs is a Javascript sandboxing library.
Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes through the constructor process. An attacker can modify host global objects and persist these changes across sandbox instances by invoking the exposed constructor with attacker-controlled payloads. This allows the attacker to inject arbitrary properties into shared global objects, potentially leading to the execution of malicious code or alteration of application logic when these mutated properties are later used by the host application.