Inclusion of Functionality from Untrusted Control Sphere Affecting @theia/plugin-ext package, versions <1.70.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-THEIAPLUGINEXT-18855352
- published16 Aug 2026
- disclosed14 Aug 2026
- creditSudhanshu
Introduced: 14 Aug 2026
NewCVE-2026-19884 (opens in a new tab)How to fix?
Upgrade @theia/plugin-ext to version 1.70.0 or higher.
Overview
@theia/plugin-ext is a Theia - Plugin Extension
Affected versions of this package are vulnerable to Inclusion of Functionality from Untrusted Control Sphere due to missing workspace-trust enforcement in the plugin and extension loading path. An attacker can execute commands with the user's privileges by supplying and opening an untrusted repository whose Git configuration triggers git commands such as git status before the folder is trusted. The vulnerable @theia/git and builtin VS Code Git integration run against newly opened folders as soon as a repository is detected, so repository-local settings like .git/config core.fsmonitor are honored during startup. Opening an attacker-controlled cloned repository is enough to trigger the hostile command without any trust prompt or user confirmation.