CVE-2026-22551

Eclipse Theia AI Chat Exposes Workspace Data via Unrestricted External Image Requests

Published Jun 18, 2026 CVSS 4.0 · 6.7 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-qwjm-9c66-w4q4 [Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat
History
Type Values Removed Values Added
Title Eclipse Theia AI Chat Exposes Workspace Data via Unrestricted External Image Requests
Type Values Removed Values Added
First Time appeared Eclipse
Eclipse theia
Vendors & Products Eclipse
Eclipse theia
Type Values Removed Values Added
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.
Weaknesses CWE-201
CWE-829
References
Metrics cvssV4_0

{'score': 6.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Jun 18, 2026, 3:25 PM
Reserved
May 22, 2026, 7:47 AM
Status
Analyzed
Published
Jun 18, 2026, 4:16 PM
Modified
Oct 26, 2026, 11:10 AM