Moderate severityNVD Advisory· Published Jun 18, 2026· Updated Jun 18, 2026
CVE-2026-22551
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.
AI Insight
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@theia/ai-chat-uinpm | < 1.71.0 | 1.71.0 |
@theia/ai-chatnpm | < 1.71.0 | 1.71.0 |
@theia/ai-claude-codenpm | < 1.71.0 | 1.71.0 |
@theia/ai-code-completionnpm | < 1.71.0 | 1.71.0 |
@theia/ai-corenpm | < 1.71.0 | 1.71.0 |
@theia/ai-editornpm | < 1.71.0 | 1.71.0 |
@theia/ai-idenpm | < 1.71.0 | 1.71.0 |
Affected products
1Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-qwjm-9c66-w4q4ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-22551ghsaADVISORY
- github.com/eclipse-theia/theia/commit/e3fdfe6992389bc5fa611058d00c39d7408508edghsaWEB
- github.com/eclipse-theia/theia/issues/16892ghsaWEB
- github.com/eclipse-theia/theia/pull/17364ghsaWEB
- gitlab.eclipse.org/security/cve-assignment/-/work_items/115ghsaWEB
News mentions
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