CVE-2026-0319 in PAN-OS
Summary
by MITRE • 10/14/2026
An improper input handling vulnerability in the GlobalProtect™ gateway of Palo Alto Networks PAN-OS software enables an authenticated user to establish a GlobalProtect session using the identity of another user.
Cloud NGFW and Panorama are not affected by this vulnerability.
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Analysis
by VulDB Data Team • 10/15/2026
The identified security flaw resides within the authentication and session management subsystems of the GlobalProtect gateway component in Palo Alto Networks PAN-OS software, representing a critical failure in access control mechanisms. This specific vulnerability is classified as an improper input handling issue that allows for identity impersonation or account hijacking through manipulated request parameters. The core technical deficiency lies in how the gateway processes authentication tokens and session identifiers during the establishment of GlobalProtect virtual private network connections. Specifically, the system fails to adequately validate the binding between a user's authenticated credentials and the resulting session state, creating an opportunity for an attacker to forge or replay session data associated with a different legitimate user account. This type of flaw is commonly categorized under CWE-287: Improper Authentication, as it involves bypassing established security controls by manipulating identity assertions rather than breaking cryptographic protections directly.
The operational impact of this vulnerability is severe due to the privileged nature of GlobalProtect sessions within enterprise network architectures. An authenticated attacker who exploits this weakness can establish a tunnel using the identity of another user, effectively gaining unauthorized access to resources protected by that user's permissions. This capability undermines the principle of least privilege and compromises the integrity of audit logs, as actions performed under the impersonated account will be attributed to the victim rather than the actual perpetrator. In environments where GlobalProtect is used for remote workforce connectivity or secure branch office interconnectivity, this flaw could allow an insider threat or a compromised low-privilege user to escalate their access by masquerading as a high-privilege administrator or accessing sensitive data belonging to other departments. The risk is particularly acute in multi-tenant environments where strict isolation between users and groups is required for compliance with standards such as NIST SP 800-53 AC-2, which mandates account management procedures that prevent unauthorized access.
It is important to note the scope of this vulnerability relative to other Palo Alto Networks products. The Cloud NGFW and Panorama platforms are explicitly not affected by this specific implementation flaw in GlobalProtect gateway session handling. This distinction highlights that the issue is localized to the on-premises or virtualized deployment models of PAN-OS where the GlobalProtect portal and gateway services operate independently from the centralized management plane used for cloud-native deployments. Attackers targeting these unaffected systems would need to rely on different attack vectors, as the architectural separation in Cloud NGFW mitigates this specific input handling error found in the traditional gateway architecture.
To mitigate this vulnerability, organizations must apply the latest security patches and software updates provided by Palo Alto Networks that address the session validation logic within the GlobalProtect component. Immediate remediation involves verifying that all PAN-OS versions are updated to a release where this identity impersonation flaw has been resolved through stricter binding of user identities to session tokens. Additionally, administrators should enforce multi-factor authentication for all remote access sessions to reduce the likelihood of credential compromise leading to exploitation. Implementing network segmentation and monitoring GlobalProtect connection logs for anomalous patterns can provide an additional layer of defense in depth. Security operations centers should be alerted to monitor for unusual login times or geographic locations associated with specific user accounts, as these may indicate active exploitation attempts leveraging this identity confusion flaw. Continuous validation of session integrity through regular security audits aligned with MITRE ATT&CK technique T1078: Valid Accounts is recommended to ensure that such access control failures are detected and addressed promptly before they can be leveraged for lateral movement or data exfiltration within the enterprise network perimeter.