{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61891","assignerOrgId":"e51fbebd-6053-4e49-959f-1b94eeb69a2c","state":"PUBLISHED","assignerShortName":"eclipse","dateReserved":"2026-07-15T08:43:52.463Z","datePublished":"2026-08-05T11:03:01.669Z","dateUpdated":"2026-08-05T12:35:46.717Z"},"containers":{"cna":{"providerMetadata":{"orgId":"e51fbebd-6053-4e49-959f-1b94eeb69a2c","shortName":"eclipse","dateUpdated":"2026-08-05T11:03:01.669Z"},"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-22","description":"CWE-22","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-36","description":"CWE-36","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-200","description":"CWE-200","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-306","description":"CWE-306","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-126","descriptions":[{"lang":"en","value":"CAPEC-126"}]},{"capecId":"CAPEC-597","descriptions":[{"lang":"en","value":"CAPEC-597"}]}],"affected":[{"vendor":"Eclipse Foundation","product":"Eclipse Theia","versions":[{"status":"affected","version":"0","lessThan":"1.74.0","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-download endpoints (`GET /file`, `GET /files/`, `PUT /files/`) that convert a client-supplied URI directly to a filesystem path and stream the file, without confining it to the workspace or any allow-listed root. In browser (non-Electron) deployments the connection token is enforced only on WebSocket upgrades; the HTTP middleware in `@theia/core` re-issues the cookie and calls `next()` without rejecting tokenless HTTP requests, so these endpoints are reachable without a valid token. As a result an unauthenticated client can read any file readable by the backend process, including files outside the opened workspace (for example `/etc/hosts`, SSH keys, or tokens). Electron mode uses a separate `ElectronSecurityToken` and is not affected via this path.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend exposes HTTP file-download endpoints (`GET /file`, `GET /files/`, `PUT /files/`) that convert a client-supplied URI directly to a filesystem path and stream the file, without confining it to the workspace or any allow-listed root. In browser (non-Electron) deployments the connection token is enforced only on WebSocket upgrades; the HTTP middleware in `@theia/core` re-issues the cookie and calls `next()` without rejecting tokenless HTTP requests, so these endpoints are reachable without a valid token. As a result an unauthenticated client can read any file readable by the backend process, including files outside the opened workspace (for example `/etc/hosts`, SSH keys, or tokens). Electron mode uses a separate `ElectronSecurityToken` and is not affected via this path.</p>"}]}],"references":[{"url":"https://github.com/eclipse-theia/theia/security/advisories/GHSA-qqc8-9538-25v4"},{"url":"https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/570"},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/176"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}}],"credits":[{"lang":"en","value":"Christian Damus (http://github.com/cdamus, https://gitlab.eclipse.org/cdamus)","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T12:34:58.985421Z","id":"CVE-2026-61891","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-05T12:35:46.717Z"}}]}}