CVE search · CVE-2026-61891
CVE-2026-61891
high 7.5
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.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- emo@eclipse.org
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | high 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
emo@eclipse.orgSecondary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- eclipse · theia
References
- https://github.com/eclipse-theia/theia/security/advisories/GHSA-qqc8-9538-25v4Broken Link
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/176Vendor Advisory
- https://gitlab.eclipse.org/security/vulnerability-reports/-/issues/570Issue TrackingVendor Advisory