{"id":"GHSA-qwjm-9c66-w4q4","summary":"[Eclipse Theia] Data Exfiltration via Markdown Image Rendering in AI Chat","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.","aliases":["CVE-2026-22551"],"modified":"2026-09-10T03:50:50.303567764Z","published":"2026-06-18T18:35:22Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-06-19T19:19:22Z","nvd_published_at":"2026-06-18T16:16:52Z","cwe_ids":["CWE-201"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22551"},{"type":"WEB","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":"PACKAGE","url":"https://github.com/eclipse-theia/theia"},{"type":"WEB","url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/115"}],"affected":[{"package":{"name":"@theia/ai-chat-ui","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-chat-ui"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}},{"package":{"name":"@theia/ai-chat","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-chat"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}},{"package":{"name":"@theia/ai-claude-code","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-claude-code"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}},{"package":{"name":"@theia/ai-code-completion","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-code-completion"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}},{"package":{"name":"@theia/ai-core","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}},{"package":{"name":"@theia/ai-editor","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-editor"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}},{"package":{"name":"@theia/ai-ide","ecosystem":"npm","purl":"pkg:npm/%40theia/ai-ide"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.71.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qwjm-9c66-w4q4/GHSA-qwjm-9c66-w4q4.json"}}],"schema_version":"1.9.0","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"}]}