Local Privilege Escalation in Palo Alto Prisma Browser on macOS

Executive Summary

This vulnerability is a local privilege escalation issue in Palo Alto Networks Prisma® Browser on macOS. It allows a locally authenticated administrator who already has access to the macOS local filesystem to perform actions on the device with root privileges.

Essentially, it means that an administrator user on the affected system can exploit this flaw to gain the highest level of control (root access) on the device, potentially bypassing normal security restrictions.

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Detection Guidance

This vulnerability affects the Prisma® Browser on macOS and requires local authentication with administrator access to the local filesystem. Detection involves verifying the presence and version of Prisma Browser on macOS systems to determine if they are vulnerable.

Since this is a local privilege escalation vulnerability, network-based detection is not applicable. Instead, you can check the installed version of Prisma Browser on macOS systems to see if it is outdated or unpatched.

Suggested commands to detect the presence and version of Prisma Browser on macOS include:

• Check if Prisma Browser is installed: `ls /Applications | grep Prisma`
• Check the version of Prisma Browser (if installed): `mdls -name kMDItemVersion /Applications/Prisma\ Browser.app`
• Alternatively, use the command to get detailed info: `defaults read /Applications/Prisma\ Browser.app/Contents/Info CFBundleShortVersionString`

If the version is older than the patched version recommended by Palo Alto Networks, the system is vulnerable and should be updated immediately.

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Impact Analysis

The vulnerability can impact you by allowing an attacker with local administrator access to escalate their privileges to root level on a macOS device running Prisma® Browser. This could enable the attacker to perform any action on the device, including modifying system files, installing malicious software, or disrupting system operations.

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Compliance Impact

The provided information does not specify how this local privilege escalation vulnerability in Palo Alto Networks Prisma® Browser on macOS impacts compliance with common standards and regulations such as GDPR or HIPAA.

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Mitigation Strategies

To mitigate this vulnerability, Palo Alto Networks recommends applying the latest updates to Prisma Browser and Chromium components as provided in their security advisory.

The advisory addresses multiple vulnerabilities and includes fixes from Google's stable channel updates in June 2026, which resolve issues such as use-after-free, out-of-bounds reads/writes, type confusion, and others.

Applying these updates will reduce the risk of exploitation that could lead to remote code execution, data corruption, or denial of service.

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