[Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat

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.

Recommendation

Update the @theia/ai-editor package to the latest compatible version. Followings are version details:

• Affected version(s): < 1.71.0
• Patched version(s): 1.71.0

References

• GHSA-qwjm-9c66-w4q4
• gitlab.eclipse.org
• CVE-2026-22551
• CWE-201
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A6

Related Issues

• [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat - @theia/ai-chat-ui - CVE-2026-22551
• [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat - @theia/ai-chat - CVE-2026-22551
• [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat - @theia/ai-claude-code - CVE-2026-22551
• [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat - @theia/ai-code-completion - CVE-2026-22551

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Tags:

npm

@theia/ai-editor