Eclipse Theia <1.71.0 AI Chat Rendered Markdown Images Trigger External Requests
CVE-2026-22551 Published on June 18, 2026

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.

NVD

Vulnerability Analysis

CVE-2026-22551 can be exploited with local system access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
ACTIVE

Weakness Types

Insertion of Sensitive Information Into Sent Data

The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. Sensitive information could include data that is sensitive in and of itself (such as credentials or private messages), or otherwise useful in the further exploitation of the system (such as internal file system structure).

Inclusion of Functionality from Untrusted Control Sphere

The software imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.


Products Associated with CVE-2026-22551

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Eclipse Theia
 

Affected Versions

Eclipse Foundation Eclipse Theia:

Exploit Probability

EPSS
0.31%
Percentile
23.54%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.