CVE-2026-0275 in Prisma Browser
Summary
by MITRE • 07/09/2026
A local privilege escalation vulnerability in Palo Alto Networks Prisma® Browser allows a locally authenticated administrator with access to the macOS local filesystem to perform actions on the device with root privileges.
This issue only affects Prisma® Browser on macOS.
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Analysis
by VulDB Data Team • 07/09/2026
This vulnerability represents a critical local privilege escalation flaw within Palo Alto Networks Prisma Browser for macOS systems, where a locally authenticated administrator who already possesses access to the macOS local filesystem can elevate their privileges to achieve root-level control over the device. The flaw fundamentally undermines the security boundaries that should separate standard user access from administrative system control, creating a pathway for malicious actors or compromised legitimate users to gain unrestricted system access.
The technical nature of this vulnerability stems from improper privilege handling within the Prisma Browser application's macOS implementation. When an administrator with local access attempts to perform certain operations through the browser interface, the application fails to properly validate or restrict the privileges associated with these actions, allowing them to execute commands or access resources that should be restricted to root-level processes. This typically occurs due to insufficient input validation, improper privilege separation mechanisms, or flawed permission checks within the application's code structure, creating an attack surface where local administrative access can be leveraged to achieve full system compromise.
The operational impact of this vulnerability is severe and far-reaching for organizations using Prisma Browser on macOS devices. Once exploited, the attacker gains complete control over the affected system including the ability to modify or delete critical system files, install malicious software, access all user data, and potentially use the compromised device as a launch point for further attacks within the network. This represents a significant risk to enterprise security posture since it allows attackers who have already gained local administrative access to escalate their privileges without requiring additional authentication mechanisms or exploitation of remote vulnerabilities.
Organizations should immediately implement several mitigation strategies to address this vulnerability. The primary recommendation involves applying the latest security patches provided by Palo Alto Networks as soon as they become available, which typically include code modifications that properly enforce privilege boundaries and prevent unauthorized elevation of privileges. Additionally, system administrators should review and tighten local access controls, implement least privilege principles for local accounts, and conduct regular monitoring for suspicious activities on affected systems. Network segmentation and endpoint detection and response solutions can provide additional layers of defense to detect potential exploitation attempts.
This vulnerability aligns with CWE-276, which addresses improper privileges, and relates to ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation'. The flaw demonstrates how applications that fail to properly manage privilege levels can create opportunities for attackers who already possess local access to escalate their capabilities significantly. Organizations should also consider implementing application whitelisting policies and mandatory access controls that prevent unauthorized code execution, particularly for browser applications that may interact with system resources. Regular security assessments of macOS applications and comprehensive vulnerability management programs are essential to identify similar privilege escalation issues across the entire software ecosystem.
The broader implications extend beyond immediate exploitation scenarios as this vulnerability highlights systemic weaknesses in how enterprise browser applications handle local system interactions on macOS platforms. Security teams must recognize that even administrators with legitimate access can inadvertently create security risks if application privileges are not properly enforced, emphasizing the critical importance of robust privilege management frameworks and comprehensive application security testing procedures to prevent similar issues from emerging in other software components.