CVE-2026-44688

Indirect Prompt Injection in Eclipse Theia AI Chat Leading to Data Exfiltration and Command Execution

Published Jun 18, 2026 CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Description
In Eclipse Theia versions prior to 1.71.0, the AI chat agent processed workspace file and directory names as part of its prompt context without distinguishing them from system instructions. An attacker could craft a malicious repository with adversarial directory or file names that, when analyzed by the AI agent, would cause the agent to follow attacker-controlled instructions (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-3jww-hxqj-wfq2 [Eclipse Theia] Indirect Prompt Injection via Adversarial Workspace File and Directory Names in AI Chat
History
Type Values Removed Values Added
Title Indirect Prompt Injection in Eclipse Theia AI Chat Leading to Data Exfiltration and Command Execution
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 agent processed workspace file and directory names as part of its prompt context without distinguishing them from system instructions. An attacker could craft a malicious repository with adversarial directory or file names that, when analyzed by the AI agent, would cause the agent to follow attacker-controlled instructions (indirect prompt injection). Combined with other AI chat features available in untrusted workspaces, this enabled attack chains leading to data exfiltration via Markdown image rendering or arbitrary command execution via task definitions.
Weaknesses CWE-1427
CWE-829
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

ssvc

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Jun 19, 2026, 3:55 AM
Reserved
May 22, 2026, 7:47 AM
Status
Analyzed
Published
Jun 18, 2026, 4:16 PM
Modified
Oct 26, 2026, 11:10 AM