CVE-2026-0297 Overview
CVE-2026-0297 is a buffer overflow vulnerability in the Palo Alto Networks GlobalProtect™ app. The flaw enables a man-in-the-middle (MitM) attacker or a rogue gateway to disrupt system processes on the client host. Successful exploitation can result in arbitrary code execution with elevated privileges: SYSTEM on Windows and root on macOS and Linux. The vulnerability maps to CWE-787, Out-of-Bounds Write. Exploitation requires the attacker to be positioned on an adjacent network path between the GlobalProtect client and its portal or gateway, or to operate a rogue gateway impersonating a trusted endpoint.
Critical Impact
A network-adjacent adversary can achieve SYSTEM or root code execution on hosts running the vulnerable GlobalProtect app, undermining the endpoint security posture the VPN client is intended to enforce.
Affected Products
- Palo Alto Networks GlobalProtect app on Windows
- Palo Alto Networks GlobalProtect app on macOS
- Palo Alto Networks GlobalProtect app on Linux
Discovery Timeline
- 2026-08-13 - CVE-2026-0297 published to the National Vulnerability Database
- 2026-08-13 - Last updated in NVD database
Technical Details for CVE-2026-0297
Vulnerability Analysis
The vulnerability is a memory-safety defect in the GlobalProtect app that mishandles the size or bounds of data received from a portal or gateway. When the client parses attacker-controlled network input, it writes past the end of an allocated buffer, corrupting adjacent memory in the GlobalProtect process. Because the affected component runs with elevated privileges to manage tunnel configuration, routing, and system-level VPN state, memory corruption in this process translates directly into privileged impact on the host. An attacker can leverage the corruption either to crash the service and disrupt connectivity or to steer execution into attacker-chosen instructions, yielding arbitrary code execution as SYSTEM or root.
Root Cause
The defect is an out-of-bounds write ([CWE-787]) in the GlobalProtect client's handling of data returned from a portal or gateway. The client trusts protocol fields that describe payload structure and length without sufficient validation, allowing an adversary that controls those fields to overflow a fixed-size buffer.
Attack Vector
Exploitation requires an adjacent network position. The attacker must intercept and modify GlobalProtect traffic between the client and its portal or gateway, or stand up a rogue gateway that a client can be induced to contact. No authentication and no user interaction are required once the client initiates a connection to the attacker-controlled endpoint. Consult the Palo Alto Networks CVE-2026-0297 Advisory for protocol-level technical details.
No verified exploit code is available. The vulnerability is described in prose
above; refer to the vendor advisory for authoritative technical detail.
Detection Methods for CVE-2026-0297
Indicators of Compromise
- Unexpected crashes, restarts, or Windows Error Reporting entries for the GlobalProtect service (PanGPS.exe) or the corresponding daemon on macOS and Linux.
- GlobalProtect client connections to portal or gateway hostnames or IP addresses that do not match the organization's published GlobalProtect infrastructure.
- Child processes spawned by the GlobalProtect service that are not part of normal VPN operation, particularly command interpreters or scripting hosts running as SYSTEM or root.
Detection Strategies
- Alert on TLS connections from the GlobalProtect client to endpoints outside the sanctioned portal and gateway list.
- Detect ARP spoofing, rogue DHCP, or DNS response manipulation on user network segments that could enable a MitM position against GlobalProtect sessions.
- Correlate GlobalProtect process crashes with subsequent privileged process execution or persistence changes on the same host.
Monitoring Recommendations
- Forward GlobalProtect client logs and endpoint process telemetry into a central analytics platform for correlation across hosts.
- Baseline the expected set of GlobalProtect portals and gateways per site and alert on deviations.
- Monitor for new scheduled tasks, launch daemons, or systemd units created by the GlobalProtect process context after an unexpected restart.
How to Mitigate CVE-2026-0297
Immediate Actions Required
- Inventory all Windows, macOS, and Linux endpoints running the GlobalProtect app and identify installed versions.
- Apply the fixed GlobalProtect app release published in the Palo Alto Networks CVE-2026-0297 Advisory as soon as it is available for the deployed platforms.
- Restrict GlobalProtect clients to connect only to known-good portal and gateway FQDNs, enforced through configuration and DNS controls.
Patch Information
Palo Alto Networks tracks fixed versions and workarounds in the vendor advisory at security.paloaltonetworks.com/CVE-2026-0297. Administrators should consult the advisory for the specific GlobalProtect app versions that remediate the buffer overflow on each supported operating system.
Workarounds
- Enforce strict certificate pinning and validation for GlobalProtect portal and gateway connections to reduce MitM feasibility.
- Require users to connect from trusted networks or through hardened out-of-band paths until patched clients are deployed.
- Segment and monitor user LAN segments to detect and block layer-2 spoofing that would enable an adjacent-network attacker to intercept GlobalProtect traffic.
# Example: enumerate installed GlobalProtect app version on each platform
# Windows (PowerShell)
Get-ItemProperty "HKLM:\SOFTWARE\Palo Alto Networks\GlobalProtect\Settings" |
Select-Object -Property version
# macOS
defaults read /Applications/GlobalProtect.app/Contents/Info.plist CFBundleShortVersionString
# Linux
rpm -q globalprotect 2>/dev/null || dpkg -l | grep -i globalprotect
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
