SB2026111251 - Multiple vulnerabilities in Palo Alto PAN-OS

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Main Vulnerability Database SB2026111251

SB2026111251 - Multiple vulnerabilities in Palo Alto PAN-OS

Published: November 12, 2026

Security Bulletin ID SB2026111251
CSH Severity
High
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 17% Medium 50% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2026-0331)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to obtain sensitive firewall and session information.

The vulnerability exists due to exposure of sensitive information in PAN-OS dataplane traffic processing when handling network traffic. A remote attacker can send traffic to or through a dataplane interface to obtain sensitive firewall and session information.


2) Code Injection (CVE-ID: CVE-2026-0330)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote privileged user to execute arbitrary code with root privileges on Panorama.

The vulnerability exists due to improper control of code generation in PAN-OS software on Panorama when processing administrator-supplied input. A remote privileged user can inject code over the network to execute arbitrary code with root privileges.


3) Out-of-bounds write (CVE-ID: CVE-2026-0329)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service in Palo Alto Networks PAN-OS and Prisma Access.

The vulnerability exists due to an out-of-bounds write in PAN-OS software when processing network traffic sent to or through a dataplane interface. A remote attacker can send specially crafted network traffic to cause a denial of service. Exposure requires either an active IKE Gateway using certificate-based authentication with CRL or OCSP revocation checking enabled, or a configured and enabled DNS Proxy object on the firewall.


4) Improper Authentication (CVE-ID: CVE-2026-0328)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to impersonate a user, bypass security restrictions, and establish an unauthorized VPN connection.

The vulnerability exists due to improper authentication in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS when handling VPN connection requests. A remote attacker can bypass authentication to establish an unauthorized VPN connection.

Deployments using only the Global Protect client or Prisma Access Agent for VPN access are not affected.


5) Out-of-bounds write (CVE-ID: CVE-2026-0326)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disrupt service processing by causing a service process crash or memory corruption in Palo Alto Networks PAN-OS.

The vulnerability exists due to an out-of-bounds write in PAN-OS protocol and service processing when handling network traffic with SCTP enabled, a DNS proxy object configured and enabled, or OSPFv3 routing enabled on an IPv6 interface. A remote attacker can send specially crafted network traffic to cause a service process crash or memory corruption.


6) Improper Verification of Source of a Communication Channel (CVE-ID: CVE-2026-0325)

CWE-ID: CWE-940 - Improper Verification of Source of a Communication Channel

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to bypass IP address restrictions and circumvent network access controls that rely on source IP filtering.

The vulnerability exists due to improper verification of the source of a communication channel in the GlobalProtect gateway of Palo Alto Networks PAN-OS when handling network traffic. A remote user can use valid GlobalProtect credentials and misrepresent the source of traffic to bypass source IP-based access controls.

Exposure is limited to PAN-OS firewall configurations with a GlobalProtect gateway enabled.


Remediation

Install update from vendor's website.

References