CVE-2026-61891
7.5 HIGHpublic exploit availablePublished 2026-08-05 · Updated 2026-08-07
AI risk analysis
- Summary
- The flaw allows unauthenticated clients to read any file accessible by the backend process due to improper URI handling and lack of proper token validation in non-Electron deployments.
- Exploitability
- Exploitation is relatively easy as no valid token is required for HTTP requests, making it a significant security risk.
- Blast radius
- If exploited, this could lead to data breaches, unauthorized access to sensitive files, and potential system compromise.
- Prioritized remediation
- Update to the latest version of Eclipse Theia (1.74 or later) which addresses this vulnerability.
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-22, CWE-36, CWE-200, CWE-306
Vendors
eclipse
Products
theia
Public exploit & PoC references
All references
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.