Compliance Impact

CVE-2026-6605 enables attackers to perform server-side request forgery attacks that can lead to the exfiltration of sensitive internal and cloud metadata information, including cloud credentials and internal service data.

Such unauthorized access and data exfiltration could potentially violate data protection and privacy regulations like GDPR and HIPAA, which require strict controls over sensitive data access and protection against unauthorized disclosure.

However, the provided information does not explicitly mention compliance impacts or specific regulatory considerations.

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Executive Summary

This vulnerability is a security flaw found in modelscope agentscope versions up to 1.0.18. It affects the function _get_bytes_from_web_url in the file src/agentscope/_utils/_common.py within the Internal Service component. The flaw allows an attacker to perform server-side request forgery (SSRF) by manipulating this function. This means an attacker can make the server send unauthorized requests to other internal or external resources. The attack can be initiated remotely, and the exploit code has been publicly released.

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Impact Analysis

This vulnerability can impact you by allowing an attacker to make the affected server send unauthorized requests to internal or external systems. This can lead to unauthorized access to internal resources, data leakage, or further exploitation of internal services that are not directly accessible from outside. Since the attack can be performed remotely and the exploit is publicly available, it increases the risk of compromise.

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Detection Guidance

This vulnerability can be detected by monitoring for unusual server-side requests initiated by AgentScope, especially those fetching internal or cloud metadata URLs. Look for requests to internal IP ranges or cloud metadata endpoints such as http://169.254.169.254/ in logs or network traffic.

You can also inspect API responses for unexpected base64-encoded content that may indicate exfiltration of internal data.

Suggested commands to detect exploitation attempts include:

• Using tcpdump or tshark to capture HTTP requests from the AgentScope server to internal IPs or cloud metadata endpoints, e.g.: tcpdump -i eth0 host 169.254.169.254
• Using grep or similar tools to search server logs for URLs containing suspicious patterns like ".wav" appended to internal or cloud metadata URLs.
• Monitoring API responses for base64-encoded data that could be decoded to reveal sensitive information.

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Mitigation Strategies

Immediate mitigation steps include restricting the AgentScope service's ability to make outbound HTTP requests to internal or cloud metadata IP addresses.

Implement network-level controls such as firewall rules or egress filtering to block access to sensitive internal IP ranges (e.g., 169.254.169.254 for AWS metadata).

Review and update the AgentScope configuration or code to validate and sanitize URLs before fetching, including blocking private IP ranges and disallowing untrusted URL schemes.

If possible, upgrade to a fixed version of AgentScope once available or apply patches that address the SSRF vulnerability.

Monitor logs and network traffic for signs of exploitation attempts and respond accordingly.

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