Cross-site request forgery in Eclipse Foundation Eclipse Theia
CVSS score
8.8
EPSS probability
%0.4
Risk score
0.0
Published
2 mo ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
CVE-2026-60009 allows unauthenticated attackers to perform arbitrary file writes in Eclipse Theia versions up to 1.73.1 via a cross-site request forgery vulnerability in the file-upload endpoint. This can lead to remote code execution by overwriting startup files. The vulnerability is not present in Electron mode due to separate security token enforcement.
This vulnerability enables unauthenticated remote code execution, posing a significant risk to systems using Eclipse Theia. It allows attackers to modify startup files and execute arbitrary commands, with no authentication needed. The impact is severe due to the lack of authentication and workspace boundaries.
What should be done?
- Upgrade to Eclipse Theia 1.74.0 or later
- Apply vendor-specific patch if available
- Ensure Electron mode is used for enhanced security
Chain of evidence and sources
CVE-2026-60009, Eclipse Theia versiyonları 1.73.1'e kadar olan sistemlerde, bir çoklu form yükleme aracılığıyla, çalışma alanına sınırlama ve kimlik doğrulamasız bir şekilde herhangi bir mutlak yolda dosya yazma izni sağlar.
İşlem başlatma dosyaları gibi ~/.bashrc gibi dosyaları değiştirme yetkisi, kimlik doğrulamasız olarak uzak kod çalıştırmasını sağlar.
Tarayıcı (Elektron değil) dağıtımlarında var olan bu eksiklik, Electron modunda ElectronSecurityToken ile ayrı bir şekilde korunur.
Show the technical text from the sources
In Eclipse Theia versions up to and including 1.73.1, the `@theia/filesystem` backend binds `POST /file-upload` in every filesystem-enabled deployment. The handler takes an attacker-supplied absolute path from the multipart `uri` field and calls `fs.move(tmp, target, { overwrite: true })` with no workspace confinement and no authentication. 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. Because `multipart/form-data` is a CORS-safelisted request type, a cross-origin web page can trigger the write with no preflight and no credentials, resulting in an unauthenticated arbitrary file write outside the workspace to any absolute path the backend process can write. This can escalate to remote code execution, for example by overwriting a startup-executed file such as `~/.bashrc`. 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:R/S:U/C:H/I:H/A:H
CWE: CWE-352, CWE-306, CWE-22, CWE-73
Explanation produced with the local qwen3:4b-instruct model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.8 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CVE CNA |
| 8.8 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
CVE-2026-60009 : the database holds 1 public PoC/exploit sources for it. For direct links to the sources, open the Public Exploits tab.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-60009 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-60009 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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