PT-2026-50688 · Eclipse Foundation · Eclipse Theia

Piotr Ryciak · Published 2026-06-18 · Updated 2026-06-18 · CVE-2026-22551

NVD

CVSS v4.0

6.7

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

Weakness Enumeration

CWE-201

CWE-829

Related Identifiers

CVE-2026-22551

Affected Products

Eclipse Theia

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-22551 · Security Note
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/115 · Note