{
"id": "GHSA-qwjm-9c66-w4q4",
"aliases": [
"CVE-2026-22551"
],
"details": "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.",
"summary": "[Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-chat-ui",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-chat",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-claude-code",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-code-completion",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-core",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-editor",
"ecosystem": "npm"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.71.0"
}
]
}
],
"package": {
"name": "@theia/ai-ide",
"ecosystem": "npm"
}
}
],
"modified": "2026-06-19T19:19:23Z",
"severity": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"published": "2026-06-18T18:35:22Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22551",
"type": "ADVISORY"
},
{
"url": "https://github.com/eclipse-theia/theia/issues/16892",
"type": "WEB"
},
{
"url": "https://github.com/eclipse-theia/theia/pull/17364",
"type": "WEB"
},
{
"url": "https://github.com/eclipse-theia/theia/commit/e3fdfe6992389bc5fa611058d00c39d7408508ed",
"type": "WEB"
},
{
"url": "https://github.com/eclipse-theia/theia",
"type": "PACKAGE"
},
{
"url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/115",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-201"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2026-06-18T16:16:52Z",
"github_reviewed_at": "2026-06-19T19:19:22Z"
}
}