hcengineering Huly Platform Import Endpoint index.ts server-side request forgery

The SSRF vulnerability in Huly Platform allows an attacker to craft malicious requests that the server will execute on behalf of the attacker. This can lead to several consequences. An attacker could potentially access internal services that are not directly exposed to the internet, such as databases, configuration files, or administrative interfaces. They might also be able to scan internal networks for other vulnerable systems, facilitating lateral movement. The ability to make arbitrary requests also opens the door to data exfiltration and denial-of-service attacks against internal resources. The presence of a public exploit significantly increases the likelihood of exploitation and the potential for widespread impact.

Organizations deploying Huly Platform in environments with sensitive internal resources are at significant risk. Specifically, deployments where the platform interacts with internal APIs or databases without proper network segmentation are particularly vulnerable. Shared hosting environments where multiple users share the same Huly Platform instance should also be considered high-risk.

• nodejs: Monitor process execution for unusual outbound network connections originating from the Huly Platform process. Use lsof or netstat to identify connections to unexpected internal or external hosts.

lsof -i -p $(pidof huly-platform)

• nodejs: Examine application logs for suspicious HTTP requests or error messages related to URL parsing or redirection. Look for patterns indicative of SSRF attempts.

grep -i 'url:' /var/log/huly-platform/access.log

• generic web: Use curl to test for SSRF by attempting to access internal resources through the vulnerable endpoint.

curl -v http://<huly_platform_ip>/import?url=http://169.254.169.254/metadata/instance-id

1. 2026-04-06Disclosure

   disclosure

1. Gereserveerd2026-04-05
2. Gepubliceerd2026-04-06
3. EPSS bijgewerkt2026-04-13

The primary mitigation for CVE-2026-5623 is to upgrade to a patched version of Huly Platform as soon as it becomes available. Since no fixed version is currently specified, closely monitor the vendor's website and security advisories for updates. As a temporary workaround, implement strict input validation on any user-supplied URLs or hostnames used in requests made by the Import Endpoint. Consider deploying a Web Application Firewall (WAF) with rules to block suspicious outbound requests based on URL patterns or destination IP addresses. Restrict network access to the Huly Platform server to only necessary ports and services.