Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-61891

Quick assessment

Affected
Eclipse Foundation Eclipse Theia
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Eclipse Theia是美国Eclipse基金会开源的一个可构建云端及桌面集成开发环境的开发框架。 Eclipse Theia 1.73.1及之前版本存在安全漏洞，该漏洞源于文件下载端点将客户端提供的URI直接转换为文件系统路径并流式传输文件，且未正确验证连接令牌，可能导致未经身份验证的攻击者读取任意文件（包括工作区外的敏感文件）。

CVSS 7.5 · High EPSS 0.53% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
Eclipse Foundation Eclipse Theia < 1.74.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-61891

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse Theia 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eclipse Theia是美国Eclipse基金会开源的一个可构建云端及桌面集成开发环境的开发框架。 Eclipse Theia 1.73.1及之前版本存在安全漏洞，该漏洞源于文件下载端点将客户端提供的URI直接转换为文件系统路径并流式传输文件，且未正确验证连接令牌，可能导致未经身份验证的攻击者读取任意文件（包括工作区外的敏感文件）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse Theia 0 ~ 1.74.0 -

II. Public POCs for CVE-2026-61891

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7373 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-61891

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-61891 (2)

Other References for CVE-2026-61891 (1)

Same Patch Batch · Eclipse Foundation · 2026-08-05 · 6 CVEs total

CVE-2026-60009 8.8 HIGH Eclipse Theia 路径遍历漏洞
CVE-2026-12609 7.5 HIGH Eclipse Theia 路径遍历漏洞
CVE-2026-14574 5.7 MEDIUM Eclipse Theia 输入验证错误漏洞
CVE-2026-14304 4.6 MEDIUM Eclipse Accessibility Tools Framework 输入验证错误漏洞
CVE-2026-46581 Eclipse Mojarra 路径遍历漏洞

IV. Related Vulnerabilities

Same product: Eclipse Theia
Same vendor: Eclipse Foundation
Same weakness: CWE-22

V. Comments for CVE-2026-61891

No comments yet

Leave a comment