Server-Side Request Forgery in CrewAI Before 1.15.1

Executive Summary

CVE-2026-62240 is a server-side request forgery (SSRF) vulnerability in CrewAI versions before 1.15.1. The issue lies in the validate_url function, which performs a one-time DNS resolution and checks against a blocklist before returning the original URL without further validation.

Attackers can exploit this flaw by providing URLs that redirect to internal network addresses or using DNS rebinding techniques. These methods allow bypassing the security filter, enabling access to internal services or cloud metadata endpoints that should not be exposed.

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Detection Guidance

Detecting this vulnerability requires checking for the presence of vulnerable versions of CrewAI (before 1.15.1) in your environment. Since the vulnerability involves server-side request forgery (SSRF) with DNS rebinding or redirect bypass techniques, you can perform the following steps:

• Identify systems running CrewAI versions prior to 1.15.1. This can be done by checking the installed version of CrewAI in your environment using package management tools or application logs.
• Monitor network traffic for unusual outbound requests to internal or cloud metadata endpoints, which may indicate exploitation attempts. Tools like Wireshark, tcpdump, or network firewalls can help capture and analyze such traffic.
• Example command to check the installed version of CrewAI (if using Python package manager): pip show crewai
• Example command to monitor DNS requests for suspicious domains (Linux): sudo tcpdump -i any 'udp port 53' | grep 'suspicious-domain'

Since the vulnerability involves one-shot DNS resolution and blocklist bypass, detecting active exploitation may require deeper inspection of application logs for unexpected URL redirections or internal service access attempts.

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Impact Analysis

This vulnerability can have several impacts if exploited:

• Unauthorized access to internal systems: Attackers may gain access to internal services or resources that are not meant to be publicly accessible.
• Exposure of sensitive data: If internal services or cloud metadata endpoints are accessed, sensitive information such as credentials, configuration details, or other confidential data may be leaked.
• Potential for further attacks: Access to internal systems can serve as a foothold for additional attacks, such as lateral movement within a network or escalation of privileges.

The CVSS v3.1 score of 7.4 (High) and CVSS v4.0 score of 8.3 (High) indicate that this vulnerability poses a significant risk, particularly to confidentiality.

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Compliance Impact

This vulnerability can impact compliance with several standards and regulations, depending on the context in which CrewAI is used:

• GDPR (General Data Protection Regulation): If the vulnerability leads to unauthorized access to personal data of EU citizens, it could result in a data breach. GDPR requires organizations to implement appropriate security measures to protect personal data, and failure to do so may lead to significant fines and legal consequences.
• HIPAA (Health Insurance Portability and Accountability Act): If CrewAI is used in a healthcare context and the vulnerability exposes protected health information (PHI), it could violate HIPAA's Security Rule. This rule mandates safeguards to ensure the confidentiality, integrity, and availability of PHI.
• Other standards: Depending on the industry, this vulnerability may also affect compliance with standards like PCI DSS (Payment Card Industry Data Security Standard) if payment information is exposed, or SOC 2 if the organization handles customer data and is required to maintain strong security controls.

Organizations using affected versions of CrewAI should assess their exposure and take remediation steps to avoid potential compliance violations.

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Mitigation Strategies

To mitigate this vulnerability, follow these immediate steps:

• Upgrade CrewAI to version 1.15.1 or later, as this version contains fixes for the SSRF vulnerability in the validate_url function.
• If upgrading is not immediately possible, implement network-level controls to restrict outbound requests from the application to only trusted external domains. This can be done using firewalls or proxy servers.
• Disable or restrict access to internal services and cloud metadata endpoints that could be targeted by SSRF attacks. Ensure these endpoints are not accessible from the application's network context.
• Monitor application logs for any attempts to access internal or restricted URLs, and set up alerts for suspicious activity.
• Review and update any custom blocklists or URL validation logic in your application to account for redirect-based or DNS rebinding bypass techniques.

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