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OpenAdvisories
High · 8.4 CVE-2026-44691 EUVD-2026-37901GHSA-g9jw-92q7-g7fj

[Eclipse Theia] Arbitrary Command Execution via Untrusted Workspace Task Definitions

Published Jun 18, 2026 · Updated Jun 19, 2026 · Assigned by eclipse

Description

In Eclipse Theia versions prior to 1.69.0, custom task definitions in workspace files (e.g. .theia/tasks.json, .vscode/tasks.json) could be executed without requiring workspace trust. An attacker could craft a malicious repository that, when cloned and opened in Theia, leads to execution of arbitrary commands with the user's privileges. In combination with AI chat features and a workspace .theia/settings.json that disabled tool confirmation, this could be triggered automatically by sending a message in the AI chat.

Affected products

VendorProductAffectedFixed
Eclipse Foundation Eclipse Theia < 1.69.0 1.69.0

Affected packages

EcosystemPackageAffectedFixedRecord
npm @theia/debug < 1.69.0 1.69.0 GHSA-g9jw-92q7-g7fj
npm @theia/task < 1.69.0 1.69.0 GHSA-g9jw-92q7-g7fj
npm @theia/workspace < 1.69.0 1.69.0 GHSA-g9jw-92q7-g7fj

References