CVE-2026-22551: [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat
(updated )
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.
References
- github.com/advisories/GHSA-qwjm-9c66-w4q4
- github.com/eclipse-theia/theia/commit/e3fdfe6992389bc5fa611058d00c39d7408508ed
- github.com/eclipse-theia/theia/issues/16892
- github.com/eclipse-theia/theia/pull/17364
- gitlab.eclipse.org/security/cve-assignment/-/work_items/115
- nvd.nist.gov/vuln/detail/CVE-2026-22551
Code Behaviors & Features
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