CVE-2026-44691: High severity Eclipse Eclipse Theia vulnerability

Published Jun 18, 2026
·
Updated

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 Software

5 affected componentsFixes available
Eclipse Eclipse Theia<1.69.0
npm/@theia/workspace<1.69.0
1.69.0
npm/@theia/task<1.69.0
1.69.0
npm/@theia/debug<1.69.0
1.69.0
Eclipse theia<1.69.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade npm/@theia/workspace to a version that resolves this vulnerability.

    Fixed in 1.69.0
  2. Upgrade

    Upgrade npm/@theia/task to a version that resolves this vulnerability.

    Fixed in 1.69.0
  3. Upgrade

    Upgrade npm/@theia/debug to a version that resolves this vulnerability.

    Fixed in 1.69.0
  4. Configuration

    Enable tool confirmation in .theia/settings.json so that AI chat and other features require explicit user confirmation before invoking external tools or commands.

    Workspace settings (.theia/settings.json) tool confirmation = enabled
  5. Configuration

    Configure Theia to require workspace trust before executing workspace-defined tasks (for example .theia/tasks.json or .vscode/tasks.json) to prevent automatic execution from untrusted repositories.

    Eclipse Theia workspace trust = required

Event History

Jun 18, 2026
CVE Published
via MITRE·02:35 PM
Data Sourced
via MITRE·02:35 PM
DescriptionWeakness
Data Sourced
via NVD·04:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Advisory Published
via GitHub·06:35 PM
Data Sourced
via GitHub·06:35 PM
DescriptionWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-44691?

The severity of CVE-2026-44691 is high, rated at 8.4 on the CVSS scale.

2

How do I fix CVE-2026-44691?

To fix CVE-2026-44691, upgrade Eclipse Theia to version 1.69.0 or later.

3

What vulnerabilities are associated with CVE-2026-44691?

CVE-2026-44691 allows execution of arbitrary code via custom task definitions without workspace trust.

4

Which versions of Eclipse Theia are affected by CVE-2026-44691?

Eclipse Theia versions prior to 1.69.0 are affected by CVE-2026-44691.

5

What impact does CVE-2026-44691 have on security?

CVE-2026-44691 can lead to unauthorized code execution, posing significant risks to the security of the user's environment.

Company

Resources

Contact

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