CVE-2026-22551
Description
In Eclipse Theia versions prior to 1.71.0, the AI chat rendered Markdown image tags from AI responses, triggering HTTP requests to arbitrary external URLs without restriction. Combined with prompt injection in a malicious workspace, an attacker could induce the AI agent to construct image URLs encoding sensitive information from the workspace or conversation context, exfiltrating it to attacker-controlled servers. The workspace trust enforcement introduced in v1.71.0 mitigates the documented attack chain by disabling AI features in untrusted workspaces.
How to fix
- eclipse theia1.71.0 or later
- @theia/ai-chat-ui1.71.0 or later
- @theia/ai-chat1.71.0 or later
- @theia/ai-claude-code1.71.0 or later
- @theia/ai-code-completion1.71.0 or later
- @theia/ai-core1.71.0 or later
- @theia/ai-editor1.71.0 or later
- @theia/ai-ide1.71.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| eclipse theia | v < 1.71.0 | 1.71.0 |
| @theia/ai-chat-uinpm | v < 1.71.0 | 1.71.0 |
| @theia/ai-chatnpm | v < 1.71.0 | 1.71.0 |
| @theia/ai-claude-codenpm | v < 1.71.0 | 1.71.0 |
| @theia/ai-code-completionnpm | v < 1.71.0 | 1.71.0 |
| @theia/ai-corenpm | v < 1.71.0 | 1.71.0 |
| @theia/ai-editornpm | v < 1.71.0 | 1.71.0 |
| @theia/ai-idenpm | v < 1.71.0 | 1.71.0 |
Check your version
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Attack Surface Management
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