medium6.5
CVE-2026-22551
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 with…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @theia/ai-chat-ui | < 1.71.0 | 1.71.0 |
| npm | @theia/ai-chat | < 1.71.0 | 1.71.0 |
| npm | @theia/ai-claude-code | < 1.71.0 | 1.71.0 |
| npm | @theia/ai-code-completion | < 1.71.0 | 1.71.0 |
| npm | @theia/ai-core | < 1.71.0 | 1.71.0 |
| npm | @theia/ai-editor | < 1.71.0 | 1.71.0 |
| npm | @theia/ai-ide | < 1.71.0 | 1.71.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Eclipse | Theia | before 1.71.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-qwjm-9c66-w4q4
- https://nvd.nist.gov/vuln/detail/CVE-2026-22551
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/115
- https://github.com/eclipse-theia/theia/issues/16892
- https://github.com/eclipse-theia/theia/pull/17364
- https://github.com/eclipse-theia/theia/commit/e3fdfe6992389bc5fa611058d00c39d7408508ed