CVE-2026-22551

mediumpriority · track · 26EPSS 0.003 · 24 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.31% (24th) EPSS

CVSS 6.5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.7

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v4.06.7mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.06.7mediumCVSS:4.0/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:Xsecondary · emo@eclipse.org

v4.04mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-201USCWE-201USCWE-829US

affected products (9)

Products and version ranges known to be affected.

Eclipse Foundation Eclipse Theia0 → 1.71.0enisa_euvdEU
eclipse theia< 1.71.0nvdUScpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*
npm @theia/ai-chat< 1.71.0osvUSpkg:npm/%40theia/ai-chat
npm @theia/ai-chat-ui< 1.71.0osvUSpkg:npm/%40theia/ai-chat-ui
npm @theia/ai-claude-code< 1.71.0osvUSpkg:npm/%40theia/ai-claude-code
npm @theia/ai-code-completion< 1.71.0osvUSpkg:npm/%40theia/ai-code-completion
npm @theia/ai-core< 1.71.0osvUSpkg:npm/%40theia/ai-core
npm @theia/ai-editor< 1.71.0osvUSpkg:npm/%40theia/ai-editor
npm @theia/ai-ide< 1.71.0osvUSpkg:npm/%40theia/ai-ide

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-qwjm-9c66-w4q4[Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat2026-06-18ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2026-06-18modified 2026-10-26

references (4)

External citations — patches, advisories, analysis.

scry

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