CVE-2026-0301 in Cloud NGFW
Summary
by MITRE • 08/13/2026
An information disclosure vulnerability in the URL Filtering feature of Palo Alto Networks PAN-OS® software enables an unauthenticated user with network access to obtain sensitive information.
Panorama is not impacted by this vulnerability.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/25/2026
This vulnerability represents a critical information disclosure flaw within the URL Filtering functionality of Palo Alto Networks PAN-OS software, classified under CWE-200 Information Exposure. The issue arises from insufficient access controls that allow unauthenticated attackers with mere network connectivity to extract sensitive data from affected systems. The vulnerability specifically affects the URL filtering component which processes and analyzes web traffic patterns, potentially exposing confidential information about network policies, user activities, or system configurations.
The technical implementation of this flaw demonstrates a failure in authentication and authorization mechanisms within the software's security architecture. Attackers can exploit this weakness without requiring valid credentials or privileged access, making it particularly dangerous as it bypasses traditional security controls that would normally prevent unauthorized data access. The vulnerability exists in the way the system handles requests to URL filtering resources, where proper validation of request origins and user authentication is either missing or inadequately implemented.
From an operational perspective, this information disclosure vulnerability poses significant risks to organizations relying on Palo Alto Networks firewalls for network security. The exposure of sensitive information could include internal network topology details, user behavior patterns, security policy configurations, or other confidential data that could be leveraged by adversaries for more sophisticated attacks. This weakness directly impacts the principle of least privilege and can undermine the effectiveness of the entire firewall security infrastructure.
Organizations should immediately implement mitigations including applying the latest security patches released by Palo Alto Networks, implementing network segmentation to limit access to affected systems, and monitoring network traffic for suspicious activity related to URL filtering components. The ATT&CK framework categorizes this type of vulnerability under T1005 Data from Local System, where adversaries exploit information disclosure weaknesses to gather intelligence about target environments. Additionally, organizations should conduct thorough security assessments of their firewall configurations and consider implementing additional logging and monitoring controls to detect potential exploitation attempts.
The vulnerability highlights the importance of proper input validation and access control implementation in network security appliances, as outlined in industry standards such as NIST SP 800-53 and ISO 27001. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other network components that may present analogous information disclosure risks. Organizations must also ensure that their incident response procedures include specific protocols for handling information disclosure vulnerabilities, particularly those affecting core security infrastructure components like firewalls and intrusion prevention systems.