CVE-2026-85609
Received Received - Intake

Unauthenticated SSRF in Openpanel via Site Checker Endpoint

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: VulnCheck

Description
Openpanel before 2.3.0 contains an unauthenticated full-read server-side request forgery (SSRF) vulnerability in the GET /tools/site-checker endpoint (apps/api/src/controllers/tools.controller.ts). The endpoint passes a user-supplied url query parameter to fetchWithRedirects() and performs server-side HTTP requests to arbitrary URLs without any SSRF/IP validation. An unauthenticated remote attacker can access cloud instance metadata endpoints, probe internal services, scan internal network ports, and read returned content (status code, page size, timing, and parsed HTML metadata), and leak internal IP addresses (via getIPInfo() to a third party).

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-85609
EUVD
EUVD-2026-71028

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openpanel openpanel to 2.3.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This is an unauthenticated Server-Side Request Forgery (SSRF) vulnerability in Openpanel versions before 2.3.0. It exists in the GET /tools/site-checker endpoint which accepts a user-supplied 'url' parameter. The endpoint passes this URL to fetchWithRedirects() without proper validation, allowing server-side HTTP requests to arbitrary destinations. Attackers can exploit this to access cloud metadata, probe internal services, scan ports, and leak internal IP addresses.

Detection Guidance

To detect this vulnerability, monitor network traffic for unusual outbound requests from your Openpanel server, particularly to cloud metadata endpoints (e.g., AWS, GCP, Azure metadata services). Check logs for repeated requests to the /tools/site-checker endpoint with arbitrary URLs. Use tools like tcpdump or Wireshark to inspect HTTP requests originating from the Openpanel process.

Impact Analysis

An attacker could access cloud instance metadata to steal IAM credentials and configuration, probe and fingerprint internal services, scan internal network ports, leak internal IP addresses, and gather information like status codes, page sizes, timing, and parsed HTML metadata from responses. They could also perform DNS rebinding attacks and measure raw TCP/TLS connections.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Exposure of internal IP addresses and cloud metadata may constitute a data breach, requiring breach notifications under these regulations. The information leakage could also impact data integrity and availability controls.

Mitigation Strategies

Immediately upgrade Openpanel to version 2.3.0 or later to patch the vulnerability. If upgrading is not possible, restrict access to the /tools/site-checker endpoint by implementing authentication and IP whitelisting. Disable the endpoint if unused. Add SSRF protections by validating all resolved IP addresses against private/reserved ranges and pin DNS resolution to prevent DNS rebinding.

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